Document:

<PAGE>

                                                                    EXHIBIT 10.8

                             TAX SHARING AGREEMENT

     THIS AGREEMENT is entered into as of March 31, 2001 (the "Effective Date")
between Millipore Corporation ("Millipore") and Mykrolis Corporation
("Mykrolis").

     WHEREAS, certain members of the Millipore Group (as defined below) and the
Mykrolis Group (as defined below) are part of an Affiliated Group filing
consolidated federal income tax returns and certain consolidated, combined and
unitary state or local income tax returns;

     WHEREAS, the parties hereto wish to set forth their agreement with respect
to the allocation and payment of Taxes (as defined below) attributable to them,
and to allocate responsibility for the preparation and filing of returns, other
tax-related obligations, and the maintenance of records for all periods through,
or which include, the Distribution (as defined below) of Mykrolis; and

     WHEREAS, pursuant to the Master Separation and Distribution Agreement
between Millipore and Mykrolis effective as of March 31, 2001 (the "Master
Agreement"), Millipore has transferred certain operations conducted by it to
Mykrolis (the "Separation") and will distribute the stock of Mykrolis to
Millipore shareholders (the "Distribution") in a transaction intended to qualify
as a tax-free transaction under sections 368(a)(1)(D) and 355 of the Internal
Revenue Code of 1986, as amended (the "Code").

     NOW, THEREFORE, in consideration of the premises and of the mutual
covenants and agreements hereinafter set forth, the parties hereby agree,
effective as of the Effective Date, as follows:

     1.    Definitions.

     As used in this Agreement:

          "Affiliated Company" shall mean any entity that controls, is
           ------------------
          controlled by, or is under common control with such person.  As used
          herein, "control" means the possession, directly or indirectly, of the
          power to direct or cause the direction of the management and policies
          of such entity, whether through ownership of voting securities or
          other interests, by contract or otherwise.

          "Affiliated Group" shall mean an affiliated group of corporations
           ----------------
          within the meaning of section 1504(a) of the Code for the taxable year
          in question.

          "Distribution Date" shall mean the date of the Distribution of
           -----------------
          Mykrolis stock to Millipore shareholders.

          "Federal Income Tax" shall mean any U.S. federal income tax (including
           ------------------
          any alternative minimum tax), including any interest, penalty or
          addition thereto, whether disputed or not.
<PAGE>

          "Foreign Restructuring Tax" shall mean any Tax imposed on Millipore,
           -------------------------
          or any member of the Millipore Group, or Mykrolis, or any member of
          the Mykrolis Group, and other damages suffered (including reasonable
          attorneys' fees and disbursements in connection with the
          investigation, defense, or settlement of any action or threatened
          action) in connection with the transactions set forth in the Non-US
          Plan.

          "Market Valuation" shall mean as of the Distribution Date (i) with
           ----------------
          respect to Mykrolis, the fair market value of all of its outstanding
          stock (measured using the mean of the high and low of the public
          trading price) as of such date, or (ii) with respect to Millipore, the
          fair market value of all of its outstanding stock (measured using the
          mean of the high and low of the public trading price) as of such date.

          "Member" shall mean, during the period that such member is includable,
           ------
          each includable member of the Millipore Group for such year.

          "Millipore Affiliated Group" shall mean, for any taxable year of
           --------------------------
          Millipore, the Affiliated Group of which Millipore is the common
          parent for such year.

          "Millipore Group" shall mean Millipore, each subsidiary and Affiliated
           ---------------
          Company of Millipore (other than any member of the Mykrolis Group),
          after giving effect to the Non-US Plan, and each Company that becomes
          a subsidiary or Affiliated Company of Millipore.

          "Mykrolis Affiliated Group" shall mean, for any taxable year of
           -------------------------
          Mykrolis, the Affiliated Group of which Mykrolis is the common parent
          for such year or would be the common parent if it were not a
          subsidiary of Millipore.  To the extent an entity was a member of the
          Millipore Affiliated Group prior to becoming part of the Mykrolis
          Affiliated Group, the term Mykrolis Affiliated Group covers the entity
          only for the period during which it is a member of the Mykrolis
          Affiliated Group.

          "Mykrolis Group" shall mean Mykrolis, each subsidiary and Affiliated
           --------------
          Company of Mykrolis (other than any member of the Millipore Group),
          after giving effect to the Non-US Plan, and each Company that becomes
          a subsidiary or Affiliated Company of Mykrolis.

          "Non-U.S. Plan" shall mean the plan for the separation of the
          --------------
          Separated Business outside the United States as described in Exhibit H
          to the Master Separation and Distribution Agreement.

          "Other Income Tax" shall mean any state, local or foreign income tax,
           ----------------
          including any interest, penalty or addition thereto, whether disputed
          or not.

                                      -2-
<PAGE>

          "Other Tax" shall mean any state, local or foreign tax, assessment or
           ---------
          other governmental charge, including income, estimated, business,
          occupation, franchise, property, sales, use, excise, employment,
          unemployment, payroll, social security, ad valorem, transfer, gains,
          profits, capital stock, license, gross receipts, stamp, real estate,
          severance, withholding and custom, including any interest, penalty or
          addition thereto, whether disputed or not, but excluding Federal
          Income Tax and Other Income Tax.

          "Pre-Separation Period" shall mean any period (or portion thereof)
           ---------------------
          ending on or prior to the date of the Separation.

          "Pre-Separation Year" shall mean a taxable year of the Millipore
           -------------------
          Affiliated Group or other relevant Millipore group beginning prior to
          (and including) the Separation.

          "Pre-Distribution Year" shall mean a taxable year of the Millipore
           ---------------------
          Affiliated Group or other relevant Millipore group beginning prior to
          (and including) the Distribution.

          "Post-Separation Period" shall mean any period (or portion thereof)
           ----------------------
          beginning after the date of the Separation.

          "Separate Return Tax Liability" shall mean, with respect to the
           -----------------------------
          Mykrolis Affiliated Group for any Pre-Distribution Year, the sum of
          the Federal Income Tax for each member of the Mykrolis Affiliated
          Group for such year determined by using the method described in
          section 1.1502-32(b)(3)(iv)(D) of the Treasury Regulations and as if
          the Mykrolis Affiliated Group constituted a separate taxpayer.

          "Separated Business" shall mean the business (including assets,
           ------------------
          liabilities, employees and all other tangible and intangible
          property), whether originally formed or acquired by Millipore,
          contributed by Millipore to Mykrolis and not distributed back to
          Millipore.

          "Spin Damages," shall mean, with respect to the Distribution, Taxes
           -------------
          and other damages suffered (including reasonable attorneys' fees and
          disbursements in connection with the investigation, defense or
          settlement of any action or threatened action) attributable either to
          the failure of such Distribution to qualify under section 355 or
          368(a)(1)(D) of the Code or attributable to the application of section
          355(e) with respect to such Distribution, or application of section
          355(f).

          "Tax" shall mean Federal Income Tax, Other Income Tax and Other Tax.
           ---

          "Tax Benefit" shall mean a reduction in the Tax liability of a
           -----------
          taxpayer (or of the group of which it is a member) for any taxable
          period.  Except as otherwise

                                      -3-
<PAGE>

          provided in this Agreement, a Tax Benefit shall be deemed to have been
          realized or received from a Tax item in a taxable period only if and
          to the extent that the Tax liability of the taxpayer (or of the group
          of which it is a member) for such period and all prior periods, is
          less than it would have been if such Tax liability were determined
          without regard to such Tax item.

          "Tax Returns" and "Returns" shall include all returns, other forms or
           -----------       -------
          statements in respect of Taxes which are filed or required to be filed
          with a taxing authority.

          "Treasury Regulations" shall mean the income tax regulations
           --------------------
          promulgated under the Code applicable to the taxable year in question.

          (a) Other defined terms shall have the meaning assigned to them in the
     preamble to and text of this Agreement. Any term that is not defined in
     this Agreement shall, unless the context otherwise requires, have the
     meaning assigned in the Code or the Treasury Regulations. References to
     provisions of the Code or Treasury Regulations shall include a reference to
     any successor provision.

     2.   Filing of Tax Returns.

          (a) For Pre-Distribution Years, Millipore shall file, and shall make
     all determinations with respect to, all consolidated Federal Income Tax
     Returns and all other consolidated, combined, unitary or similar Tax
     Returns required to be filed by it on behalf of the Millipore Affiliated
     Group or other relevant Millipore group for such year (collectively, the
     "Pre-Distribution Group Returns"). On or before April 15 of 2002 and
      ------------------------------
     April 15 of all subsequent years, Mykrolis shall furnish to Millipore (i)
     draft Tax returns for the previous taxable year for the members of the
     Mykrolis Affiliated Group or other relevant Mykrolis Group and all
     supporting information and documentation necessary in preparing the
     relevant Pre-Distribution Group Return and (ii) such additional Tax
     information and documents as Millipore may reasonably request. Mykrolis
     shall cooperate in connection with the preparation of any Pre-Distribution
     Group Returns.

          (b) The Pre-Distribution Group Returns shall include all of the
     income, gain, loss, deductions, credits and similar items of all Members of
     the Millipore Affiliated Group or other relevant Millipore group, including
     all income, gain, loss, deductions, credits and similar items of all
     members of the Mykrolis Affiliated Group or other relevant Mykrolis group
     through its Distribution Date. Millipore shall prepare such Pre-
     Distribution Group Returns and shall have the right to exercise all the
     powers of, and shall have all the duties of, a common parent or agent as
     are conferred upon it by the Code and Treasury Regulations or similar
     authority with respect to such Pre-Distribution Group Returns. All Members
     of the Millipore Affiliated Group or other

                                      -4-
<PAGE>

     relevant Millipore group for a Pre-Distribution Year shall execute and file
     such consents, elections and other documents as may be necessary or
     appropriate for the proper filing of the Pre-Distribution Group Returns.
     However, Mykrolis shall have the right to reasonably request that any
     elections or accounting methods be used by Millipore in its preparation of
     Pre-Distribution Group Returns where such election or method may impact
     Mykrolis' liability for Taxes in the present, or any subsequent, taxable
     year; Millipore shall not unreasonably refuse any such request by Mykrolis.

          (c) For all periods beginning before the Distribution Date, Mykrolis
     shall file each member of the Mykrolis Group's Tax Returns not filed on a
     consolidated, combined, unitary or similar basis by Millipore under
     paragraph (a) above (the "Separate Returns"), and shall include on the
     Separate Returns all of its income, gains, loss, deductions, credits and
     similar items for all periods covered by the Separate Returns. For all
     periods beginning before the Distribution Date, Millipore shall file each
     member of the Millipore Group's Tax Returns not filed on a consolidated,
     combined, unitary or similar basis by Millipore under paragraph (a) above
     (the "Separate Returns"), and shall include on the Separate Returns all of
     its income, gains, loss, deductions, credits and similar items for all
     periods covered by the Separate Returns.

          (d) Any Tax Return filed by Millipore or Mykrolis with respect to a
     Pre-Distribution Period will be filed in conformance with Millipore's
     existing intercompany pricing guidelines and rulings, unless Millipore
     agrees otherwise.

     3.   Payment of Tax.

          (a) Millipore shall pay all Tax shown as due on the Pre-Distribution
     Group Returns. Mykrolis shall upon thirty (30) days' notice pay to
     Millipore an amount equal to the Separate Return Tax Liability (or similar
     liability calculated for state, local or foreign purposes) for each member
     of the Mykrolis Group or other relevant Mykrolis group for all Post-
     Separation Periods.

          (b) Within ninety (90) days of the filing of the Pre-Distribution
     Group Returns, Millipore shall be required to pay to Mykrolis any payments
     required as a result of a Tax Benefit attributable to a Post-Separation
     Period and realized by Millipore (or a Member of the Millipore Group or
     other relevant Millipore group not included in the Mykrolis Group) from the
     use of any member of the Mykrolis Group's Tax attributes, calculated on a
     company-by-company basis by Millipore in its sole discretion in accordance
     with the principles regarding the determination of Separate Return Tax
     Liability (or similar liability calculated for state, local or foreign
     purposes).

                                      -5-
<PAGE>

          (c)   Millipore shall be entitled to receive any overpayment of Tax
     shown on any Pre-Distribution Group Return, as originally filed.

          (d)   The members of the Mykrolis Group shall pay all Tax shown as due
     on its Separate Returns and all other Taxes for which any member of the
     Mykrolis Group is liable. The members of the Millipore Group shall pay all
     Tax shown as due on its Separate Returns and all other Taxes for which any
     member of the Millipore Group is liable.

     4.   Adjustments to Tax Liabilities.

          (a)   Millipore shall be responsible for, and control all decisions as
     to, Tax audits of, and proceedings regarding the Pre-Distribution Group
     Returns and other Tax Returns filed by it. Mykrolis shall be responsible
     for, and control all decisions as to, Tax audits of, and proceedings
     regarding its Separate Returns.

          (b)   Subject to paragraph (d) of this Section 4 and Section 7 below,
     if the Tax liability on any Pre-Distribution Group Return which Millipore
     files is adjusted, whether by means of an amended Return, claim for refund,
     or after a Tax audit, Millipore shall pay all additional Tax due and shall
     be entitled to receive all refunds of Tax except:

                1.  Subject to, and to the extent provided in, Section 8,
                Mykrolis shall be entitled to refunds of the Mykrolis Group's or
                any of its members' Tax for Pre-Distribution Years attributable
                to carrybacks originating in years beginning after the
                Separation Date;

                2.  Mykrolis shall within thirty (30) days' notice pay to
                Millipore the additional Separate Return Tax Liability (or
                similar liability calculated for state, local or foreign
                purposes) of a member of the Mykrolis Group with respect to its
                Pre-Distribution Group Returns to the extent the liability
                relates to a Post-Separation Period.

          (c)   If the Tax liability with respect to the Separate Return of a
     company is adjusted, as well as any other Taxes for which the company is
     liable, whether by means of an amended Return, claim for refund, or after a
     Tax audit, the company shall pay all additional Tax due and shall be
     entitled to receive all refunds of Tax.

          (d)   Each party responsible for an audit or proceeding under
     paragraph (a) shall keep the other currently informed as to the status of
     any Tax audit or proceeding as to which the other party may be required to
     make a payment (or otherwise account) to the responsible party under this
     Section 4 and shall provide the other party with

                                      -6-
<PAGE>

     copies of any correspondence or other written materials which the
     responsible party either receives or provides to the Internal Revenue
     Service or similar taxing authority concerning such a Tax audit or
     proceeding. The party which may be required to make a payment under this
     Section 4 shall have the right to participate at its expense in any such
     Tax audit or proceeding, but this right shall not derogate from the
     responsible party's power to control all decisions as to the Tax audit or
     proceeding as provided in paragraph (a); provided, however, that the
     responsible party shall seek consent from any participating party with
     respect to any decision that may increase such participating party's Tax
     liability pursuant to this Section 4, which consent shall not be
     unreasonably withheld.

     5.  Foreign Restructuring Taxes

         (a)    In General. Notwithstanding any other provision of this
     agreement, Foreign Restructuring Tax shall be allocated in the following
     manner:

         (i)    100% to Millipore and 0% to Mykrolis for amounts imposed by any
     country in Europe,

         (ii)   7% to Millipore and 93% to Mykrolis for amounts imposed by
     Japan,

         (iii)  28% to Millipore and 72% to Mykrolis for amounts imposed by any
     country in Asia other than Japan, and

         (iv)   59% to Millipore and 41% to Mykrolis for amounts imposed by any
     country in North, Central or South America.

         (b)    Foreign Tax Credits Attributable to Foreign Restructuring Taxes.
     Any Tax Benefit, attributable to an increase in foreign tax credits
     resulting from a Foreign Restructuring Tax, shall be allocated in the same
     manner and proportion as the allocation of such Foreign Restructuring Tax
     pursuant to Section 5(a) above.

         (c)    Subsequent Adjustments. If taking into account subsequent events
     (including, for example, carrybacks of other foreign tax credits and
     adjustments that affect foreign tax credit computations) one of the parties
     determines that it did not receive any portion of the Tax Benefit that it
     is entitled to receive pursuant to Section 5(b), Mykrolis shall pay
     Millipore, or Millipore shall pay Mykrolis, as appropriate, an amount such
     that the net payment (if any) equals the portion of the net Tax Benefit
     (taking into account such subsequent events) specified in paragraph (b)
     Section 5.

     6.  Dividends from Foreign Subsidiaries/Use of Foreign Tax Credits

                                      -7-
<PAGE>

         (a)    Mykrolis and Millipore hereby acknowledge that Millipore, in its
     sole discretion, may cause any non-U.S. member of the Millipore Group or
     Mykrolis Group to issue dividends prior to the Distribution Date, or take
     any other action which causes any inclusion of income for U.S. federal
     income tax purposes that is attributable to or measured by the earnings and
     profits of such non-U.S. member of the Millipore Group or Mykrolis Group.
     Within 90 days of the filing of a tax return in which Mykrolis Group
     realizes (i) a Tax Benefit, including a reduction in Separate Return Tax
     Liability under Section 3(a), or (ii) an increase in amounts payable by
     Millipore under Section 3(b), in either case attributable to an increase in
     foreign tax credits by reason of such dividends or other action, Mykrolis
     shall pay Millipore (or amounts payable under Section 3 shall be adjusted)
     in an amount equal to such Tax Benefit or increase.

     7.  Tax Related Indemnities.

         (a)    Mykrolis shall indemnify and hold harmless the Millipore Group
     against any and all Taxes for which it or any member of the Mykrolis Group
     is responsible under this Agreement. Subject to the foregoing, Millipore
     shall indemnify and hold the Mykrolis Group harmless against any and all
     Taxes the Millipore Group is required to bear under this Agreement,
     including, without limitation, any liability under section 1.1502-6 of the
     Treasury Regulations.

         (b)    If (i) for any reason a member or members of the Mykrolis Group
     or a shareholder of such member or members is solely responsible for the
     Distribution's failure to qualify under section 355 of the Code, or (ii)
     the stock of Mykrolis is acquired by one or more persons, whether directly
     or indirectly, such that section 355(e) of the Code causes such stock not
     to be treated as "qualified property" for purposes of section 361(c)(2) of
     the Code, the Mykrolis Group shall be responsible for and Mykrolis shall
     indemnify the Millipore Group against all Spin Damages relating to such
     Distribution.

         (c)    If the Distribution fails to qualify under section 355 of the
     Code and if such failure is the responsibility of or is by reason of both
     the Millipore Group and either a member of the Mykrolis Group or a
     shareholder of such member then (I) the Mykrolis Group shall be responsible
     for and Mykrolis shall indemnify the Millipore Group against a percentage
     of the Spin Damages relating to such Distribution equal to the quotient of
     (x) Mykrolis' Market Valuation, divided by (y) the sum of (i) Mykrolis'
     Market Valuation, and (ii) Millipore's Market Valuation, and (II) Millipore
     shall be responsible for and indemnify Mykrolis against a percentage of the
     Spin Damages relating to such Distribution equal to the quotient of (x)
     Millipore's Market Valuation, divided by (y) the sum of (i) Mykrolis'
     Market Valuation, and (ii) Millipore's Market Valuation.

                                      -8-
<PAGE>

         (d)    If (i) for any reason Millipore is solely responsible for the
     Distribution's failure to qualify under section 355 of the Code, or (ii)
     the stock of Millipore is acquired by one or more persons, whether directly
     or indirectly, such that section 355(e) of the Code causes the stock of
     Mykrolis not to be treated as "qualified property" for purposes of section
     361(c)(2) of the Code, Millipore shall be responsible for and indemnify
     Mykrolis against all Spin Damages relating to such Distribution.

     8.  Carrybacks.

     If a member of the Mykrolis Affiliated Group incurs a net operating loss in
a year which begins after the Distribution Date, the Mykrolis Affiliated Group
shall elect under section 172(b)(3) of the Code to relinquish the carryback of
the net operating loss to any Pre-Distribution Taxable Year unless Millipore
consents in writing to such carryback.  If Millipore consents to such a
carryback or if a member of the Mykrolis Affiliated Group incurs in such a year
a net capital loss, unused general business tax credit, unused foreign tax
credit or any other item that is carried back to a Pre-Distribution Taxable
Year, Millipore shall pay such member an amount equal to the Tax refund received
by Millipore as a direct result of the carryback.  Millipore shall cooperate
fully in obtaining such a refund, but any out-of-pocket expenses incurred by
Millipore in connection with such efforts shall be borne Mykrolis.  In the event
a subsequent audit or proceeding increases or reduces the carryback, Millipore
shall promptly pay Mykrolis the amount of any additional Tax refund received by
Millipore resulting from such an increase and Mykrolis shall promptly pay (or
otherwise account to) Millipore the amount of any deficiency in Tax assessed
against Millipore.

     9.  Gross-Up for Taxes on Required Payments

     If the receipt or accrual of any payment required by this Agreement is
subject to any Tax, the payor shall pay an additional amount so that the total
amount received by the payee, net of any applicable Taxes, equals the amount of
the required payment.

     10. Timely Payments

     Any payments required by this Agreement that are not paid when due under
     the terms of this Agreement shall accrue interest at the current LIBOR rate
     plus two percentage points, accrued thereon until the date of full payment.

     11. Mutual Cooperation.

         (a)   Each member of the Millipore Group and the Mykrolis Group shall
     provide each other with such assistance as may be reasonably requested by
     either of them in connection with the preparation and execution of any Tax
     Return, any audit or other examination by any taxing authority, or any
     judicial or administrative

                                      -9-
<PAGE>

     proceedings relating to any Tax liability, and each will, upon the request
     of the other, provide the other with any records or information which may
     be relevant to such Return, audit or examination proceedings.

          (b)   Each party will retain all Tax Returns, schedules and work
     papers, and all material records and other documents relating thereto,
     until the later of (i) the time the applicable statutes of limitations for
     assessment of Tax for the year has expired, and (ii) the time a final
     settlement of all payments which may be required under this Agreement is
     made for the year.

     12.  Notices.

     All notices, requests, demands and other communications to any party
hereunder shall be duly given, made or served, if in writing and delivered
personally or sent by registered mail, postage prepaid to the address set forth
below or such other address as either party shall give written notice to the
other:

     If to the Millipore Affiliated Group:

          Millipore Corporation
          80 Ashby Road,
          Bedford, MA 01730
          Attn:  General Counsel
          Telecopier No.: 781-533-4728

     If to the Mykrolis Affiliated Group:

          Mykrolis Corporation
          Patriots Park
          Bedford, MA 01730
          Attn:  General Counsel
          Telecopier No.: 781-533-3125

     13.  Miscellaneous.

          (a)   Binding Effect; Assignment. Except by operation of law or in
                --------------------------
     connection with the sale of all or substantially all the assets of a party
     hereto, this Agreement shall not be assignable, in whole or in part,
     directly or indirectly, by any party hereto without the written consent of
     the other party; and any attempt to assign any rights or obligations
     arising under this Agreement without such consent shall be void; provided,
                                                                      --------
     however, that the provisions of this Agreement shall be binding upon,
     -------

                                     -10-
<PAGE>

     inure to the benefit of and be enforceable by the parties hereto and their
     respective successors and permitted assigns, but no assignment shall
     relieve any party's obligations hereunder without the written consent of
     the other party. Nothing in this Agreement, express or implied, is intended
     to confer upon any other person or entity any rights or remedies of any
     nature whatsoever under or by reason of this Agreement. This Agreement may
     be enforced separately by each member of the Millipore Group and each
     member of the Mykrolis Group.

          (b)     Further Assurances. Subject to the provisions hereof, the
                  ------------------
     parties hereto shall make, execute, acknowledge and deliver such other
     instruments and documents, and take all such other actions, as may be
     reasonably required in order to effectuate the purposes of this Agreement
     and to consummate the transactions contemplated hereby. Subject to the
     provisions hereof, each of the parties shall, in connection with entering
     into this Agreement, performing its obligations hereunder and taking any
     and all actions relating hereto, comply with all applicable laws,
     regulations, orders and decrees, obtain all required consents and approvals
     and make all required filings with any governmental agency, other
     regulatory or administrative agency, commission or similar authority and
     promptly provide the other parties with all such information as they may
     reasonably request in order to be able to comply with the provisions of
     this paragraph.

          (c)     Parties in Interest. Except as herein otherwise specifically
                  -------------------
     provided, nothing in this Agreement expressed or implied is intended to
     confer any right or benefit upon any person, firm or corporation other than
     the parties and their respective successors and permitted assigns.

          (d)     Waivers, Etc. No failure or delay on the part of the parties
                  ------------
     in exercising any power or right hereunder shall operate as a waiver
     thereof, nor shall any single or partial exercise of any such right or
     power, or any abandonment or discontinuance of steps to enforce such a
     right or power, preclude any other or further exercise thereof or the
     exercise of any other right or power. No modification or waiver of any
     provision of this Agreement nor consent to any departure by the parties
     therefrom shall in any event be effective unless the same shall be in
     writing, and then such waiver or consent shall be effective only in the
     specific instance and for the purpose for which given.

          (e)     Setoff. All payments to be made by any party under this
                  ------
     Agreement shall except to the extent otherwise specifically provided
     herein, be made without setoff, counterclaim or withholding, all of which
     are expressly waived.

          (f)     Prior Tax-Sharing Agreements; Effect on Earnings and Profits
                  ------------------------------------------------------------
     Election. This Agreement constitutes the entire agreement between the
     --------
     parties and shall supersede any other Tax-sharing or Tax-allocation
     agreement or arrangement in effect

                                      -11-
<PAGE>

     between the parties hereto prior to the Effective Date with respect to the
     matters expressly dealt with herein. Nothing in this Agreement is intended
     to change or otherwise affect any election made by the Millipore Affiliated
     Group with respect to the calculation of earnings and profits under section
     1552 of the Code or the Treasury Regulations.

          (g)    Amendment. This Agreement may not be altered, changed,
                 ---------
     modified, or terminated orally, and any modification or revision of this
                  ----------
     Agreement shall be accomplished only through a writing clearly denominated
     as an amendment to this Agreement signed by both Millipore and Mykrolis.

          (h)    Confidentiality. The parties to this Agreement shall be bound
                 ---------------
     by Article VI of the Master Separation and Distribution Agreement.

          (i)    Dispute Resolution. Any dispute, controversy or claim arising
                 ------------------
     between or among two or more parties relating to the interpretation or
     performance of this Agreement shall be handled in accordance with Article
     IX of the Master Separation and Distribution Agreement.

          (j)    Headings. Descriptive headings are for convenience only and
                 --------
     shall not control or affect the meaning or construction of any provision of
     this Agreement.

          (k)    Governing Law. This Agreement is intended to take effect as a
                 -------------
     sealed instrument governed by the laws of Commonwealth of Massachusetts
     (without giving effect to any choice or conflict of law provision or rule
     that would cause the application of the laws of any other jurisdiction).

     IN WITNESS HEREOF, the parties hereto have caused this Agreement to be duly
executed by their respective officers, each of whom is duly authorized, all as
of the day and year first above written.

                              Millipore Corporation

                              By: /s/ Francis J Lunger
                                  --------------------------
                                  Title: Executive Vice President

                              Mykrolis Corporation

                              By: /s/ Jean-Marc Pandraud
                                  --------------------------
                                  Title: President

                                      -12-<PAGE>

                                                                    EXHIBIT 10.9

                           EMPLOYEE MATTERS AGREEMENT

                                    BETWEEN

                             MILLIPORE CORPORATION

                                      AND

                              MYKROLIS CORPORATION

                                EFFECTIVE AS OF

                                 MARCH 31, 2001

<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<S>                                                                     <C>
ARTICLE I  DEFINITIONS.................................................   1
1.1  "Agreement".......................................................   1
1.2  "Benefits Committee"..............................................   1
1.3  "COBRA"...........................................................   1
1.4  "Code"............................................................   1
1.5  "Deferred Compensation Plan,".....................................   1
1.6  "Distribution"....................................................   1
1.7  "Distribution Date"...............................................   1
1.8  "ERISA"...........................................................   1
1.9  "FMLA"............................................................   2
1.10 "Foreign Plan,"...................................................   2
1.11 "401(k) Plan,"....................................................   2
1.12 "Fringe Benefit Plans,"...........................................   2
1.13 "Health and Welfare Plans,".......................................   2
1.14 "Insurance Plans".................................................   2
1.15 "IPO".............................................................   2
1.16 "IPO Closing Date"................................................   2
1.17 "IPO Registration Statement"......................................   2
1.18 "Material Feature"................................................   2
1.19 "Millipore Employee"..............................................   3
1.20 "Millipore Participation Plan"....................................   3
1.21 "Millipore Retirement Plan".......................................   3
1.22 "Millipore Stock Value"...........................................   3
1.23 "Mykrolis Business"...............................................   3
1.24 "Mykrolis Employee"...............................................   3
1.25 "Mykrolis Stock Value"............................................   3
1.26 "Participating Company"...........................................   4
1.27 "Person"..........................................................   4
1.28 "Plan"............................................................   4
1.29 "Post-Distribution Period"........................................   4
1.30 "QDRO"............................................................   4
1.31 "QMCSO"...........................................................   4
1.32 "Rabbi Trust,"....................................................   4
1.33 "Separation"......................................................   4
1.34 "Separation Date".................................................   4
1.35 "Stock Plan,".....................................................   5

ARTICLE II  GENERAL PRINCIPLES.........................................   5
2.1  ASSUMPTION OF MYKROLIS LIABILITIES................................   5
2.2  MYKROLIS' PARTICIPATION IN MILLIPORE PLANS........................   5
2.3  ESTABLISHMENT OF MYKROLIS PLANS...................................   6
2.4  TERMS OF PARTICIPATION BY MYKROLIS EMPLOYEES IN MYKROLIS PLANS....   6
2.5  BENEFITS COMMITTEE................................................   7
2.6  FOREIGN PLANS.....................................................   7
</TABLE>

                                      -i-
<PAGE>

<TABLE>
<S>                                                                     <C>
2.7  CERTAIN TRANSFERS OF EMPLOYEES BETWEEN MILLIPORE AND
     MYKROLIS..........................................................   8

ARTICLE III 401(k) PLAN................................................   8
3.1  401(k) PLAN.......................................................   8
3.2  TRANSFER OF ACCOUNTS FROM MILLIPORE 401(k) PLAN...................   8

ARTICLE IV NON-QUALIFIED PLANS.........................................   8
4.1  DEFERRED COMPENSATION PLANS.......................................   8

ARTICLE V HEALTH AND INSURANCE PLANS...................................   9
5.1  HEALTH PLANS......................................................   9
5.2  INSURANCE PLANS...................................................  11
5.3  VENDOR ARRANGEMENTS...............................................  11

ARTICLE VI EQUITY AND OTHER COMPENSATION...............................  12
6.1  CASH PROFIT SHARING PLAN..........................................  12
6.2  MANAGEMENT INCENTIVE PLAN.........................................  12
6.3  MILLIPORE OPTIONS.................................................  12
6.4  MILLIPORE RESTRICTED STOCK........................................  13

ARTICLE VII FRINGE AND OTHER BENEFITS..................................  13
7.1  FRINGE BENEFITS:..................................................  13
7.2  OTHER BENEFIT PLANS:..............................................  14

ARTICLE VIII MILLIPORE PARTICIPATION AND RETIREMENT PLANS..............  15
8.1  MILLIPORE PARTICIPATION PLAN......................................  15
8.2  MILLIPORE RETIREMENT PLAN.........................................  15
8.3  NO TRANSFER OF ASSETS TO MYKROLIS SAVINGS AND INVESTMENT
     PLAN..............................................................  15
8.4  MAKE-UP BENEFITS FOR CERTAIN EMPLOYEES............................  15

ARTICLE IX ADMINISTRATIVE PROVISIONS...................................  16
9.1  TRANSITIONAL SERVICES AGREEMENT...................................  16
9.2  PAYMENT OF LIABILITIES, PLAN EXPENSES AND RELATED MATTERS.........  16
9.3  TRANSITIONAL STAFFING SERVICES....................................  16
9.4  SHARING OF PARTICIPANT INFORMATION................................  16
9.5  REPORTING AND DISCLOSURE COMMUNICATIONS TO PARTICIPANTS...........  17
9.6  AUDITS REGARDING VENDOR CONTRACTS.................................  17
9.7  EMPLOYEE IDENTIFICATION NUMBERS...................................  17
9.8  BENEFICIARY DESIGNATIONS..........................................  17
9.9  REQUESTS FOR REGULATORY OPINIONS..................................  18
9.10 FIDUCIARY MATTERS.................................................  18
9.11 CONSENT OF THIRD PARTIES..........................................  18
9.12 MILLIPORE INTRANET................................................  18

ARTICLE X EMPLOYMENT-RELATED MATTERS...................................  18
10.1 TERMS OF MYKROLIS EMPLOYMENT......................................  18
10.2 HR DATA SUPPORT SYSTEMS...........................................  19
</TABLE>

                                      -ii-
<PAGE>

<TABLE>
<S>                                                                     <C>
10.3  EMPLOYMENT OF EMPLOYEES WITH U.S. WORK VISAS.....................  19
10.4  CONFIDENTIALITY AND PROPRIETARY INFORMATION......................  19
10.5  PERSONNEL RECORDS................................................  19
10.6  MEDICAL RECORDS..................................................  19
10.7  UNEMPLOYMENT INSURANCE PROGRAM...................................  19
10.8  NON-TERMINATION OF EMPLOYMENT; NO THIRD-PARTY
      BENEFICIARIES....................................................  20
10.9  EMPLOYMENT LITIGATION............................................  20

ARTICLE XI  GENERAL PROVISIONS.........................................  20
11.1  EFFECT IF SEPARATION, IPO AND/OR DISTRIBUTION DOES NOT OCCUR.....  20
11.2  RELATIONSHIP OF PARTIES..........................................  20
11.3  AFFILIATES.......................................................  20
11.4  GOVERNING LAW....................................................  20
11.5  ASSIGNMENT.......................................................  21
11.6  SEVERABILITY.....................................................  21
11.7  INTERPRETATION...................................................  21
11.8  AMENDMENT........................................................  21
11.9  TERMINATION......................................................  21
11.10 CONFLICT.........................................................  22
11.11 COUNTERPARTS.....................................................  22
</TABLE>
                                     -iii-
<PAGE>

                           EMPLOYEE MATTERS AGREEMENT

     This EMPLOYEE MATTERS AGREEMENT is effective as of  March 31, 2001, between
                                                         --------------
Millipore Corporation ("Millipore"), a Massachusetts corporation, and Mykrolis
Corporation ("Mykrolis"), a Delaware corporation.

     WHEREAS, Millipore and Mykrolis have agreed to enter into this Agreement to
allocate between them assets, liabilities and responsibilities with respect to
certain employee compensation, benefit plans, programs and arrangements, and
certain employment matters;

     NOW, THEREFORE, in consideration of the foregoing and the covenants and
agreements set forth below, the parties hereto agree as follows:

                                   ARTICLE I

                                  DEFINITIONS

    1.1   "Agreement" means this Employee Matters Agreement, including all
the Schedules hereto, and all amendments made hereto from time to time.

    1.2   "Benefits Committee" means the benefits committee established,
implemented and operated pursuant to Section 2.5.

    1.3   "COBRA" means the continuation coverage requirements for "group health
plans" under Title X of the Consolidated Omnibus Budget Reconciliation Act of
1985, as amended from time to time, and as codified in Code Section 4980B and
ERISA Sections 601 through 608.

    1.4   "Code" means the Internal Revenue Code of 1986, as amended from time
to time.

    1.5   "Deferred Compensation Plan," when immediately preceded by
"Millipore," means either the Millipore Corporation 2000 Deferred Compensation
Plan for Senior Management ("Millipore Deferred Compensation Plan") or the
Supplemental Savings and Retirement Plan for Salaried Employees of Millipore
Corporation ("Millipore SERP"). When immediately preceded by "Mykrolis,"
"Deferred Compensation Plan" means the deferred compensation plan to be
established by Mykrolis pursuant to Article IV.

    1.6   "Distribution" means Millipore's pro rata distribution to the holders
of its common stock, $1.00 par value, several months following the IPO, of all
the shares of Mykrolis common stock owned by Millipore.

    1.7   "Distribution Date" means the date that the Distribution is effective.

    1.8   "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended from time to time.

                                       1
<PAGE>

    1.9   "FMLA" means the Family and Medical Leave Act of 1993, as amended from
time to time.

    1.10  "Foreign Plan," when immediately preceded by "Millipore," means a Plan
maintained by Millipore for the benefit of its employees outside the U.S.  When
immediately preceded by "Mykrolis," "Foreign Plan" means a Plan to be
established by Mykrolis for the benefit of its employees outside the U.S.

    1.11  "401(k) Plan," when immediately preceded by "Millipore," means the
401(k) portion of the Millipore Participation Plan.  When immediately preceded
by "Mykrolis," "401(k) Plan" means the Mykrolis Savings and Investment Plan to
be established by Mykrolis pursuant to Article III.

    1.12  "Fringe Benefit Plans," when immediately preceded by "Millipore,"
means the Millipore employee assistance program, educational assistance program,
leave of absence program and other fringe benefit plans, programs and
arrangements, offered from time to time under the personnel policies and
practices of Millipore and sponsored and maintained by Millipore (as set forth
in Article VII and Schedule 7.1).  When immediately preceded by "Mykrolis,"
"Fringe Benefit Plans" means the fringe benefit plans, programs and arrangements
to be established by Mykrolis pursuant to Article VII.

    1.13  "Health and Welfare Plans," when immediately preceded by "Millipore,"
means the medical, health maintenance organization ("HMO"), dental, pre-tax
premium payment plans, Section 125 Plan and any similar health and welfare plans
listed on Schedule 5.1 established and maintained by Millipore for the benefit
of eligible employees of Millipore, and such other welfare plans or programs as
may apply to such employees as of the Distribution Date.  When immediately
preceded by "Mykrolis," "Health and Welfare Plans" means the Mykrolis Health
Plans, the Mykrolis Section 125 Plan, and the health and welfare plans to be
established by Mykrolis pursuant to Article V.

    1.14  "Insurance Plans" when immediately preceded by "Millipore" means the
various insurance plans provided to Millipore employees including accidental
death and dismemberment, business travel accident, long term disability, group
life and workers' compensation insurance plan as  set forth in Schedule 5.2.
When immediately preceded by "Mykrolis," "Insurance Plans" means the Mykrolis
insurance plans to established by Mykrolis pursuant to Article V.

    1.15  "IPO" means the initial public offering of Mykrolis common stock
pursuant to a registration statement on Form S-1 pursuant to the Securities Act
of 1933, as amended.

    1.16  "IPO Closing Date" means the closing of the IPO.

    1.17  "IPO Registration Statement" means the registration statement on Form
S-1 pursuant to the Securities Act of 1933 as amended, filed with the SEC on
March 16, 2001, registering the shares of common stock of Mykrolis to be issued
in the IPO, together with all amendments thereto.

    1.18  "Material Feature" means any feature of a Plan that could reasonably
be expected to be of material importance, in the aggregate, to the sponsoring
employer or the participants (or

                                      -2-
<PAGE>

their dependents or beneficiaries) of that Plan, which could include, depending
on the type and purpose of the particular Plan, the class or classes of
employees eligible to participate in such Plan, the nature, type, form, source,
and level of benefits provided under such Plan, the amount or level of
contributions, if any, required to be made by participants (or their dependents
or beneficiaries) to such Plan, and the costs and expenses incurred by the
sponsoring employer or Participating Companies for implementing and/or
maintaining such Plan.

    1.19  "Millipore Employee" means an individual who, on the Separation Date,
is:  (a) either actively employed by, or on leave of absence from, Millipore:
(b) a former employee of Millipore and who, on the Separation Date, is not a
Mykrolis Employee; or (c) an employee or group of employees designated as
Millipore Employees by Millipore and Mykrolis.

    1.20  "Millipore Participation Plan" means the Millipore Corporation
Employees' Participation and Savings Plan, as in effect from time to time.

    1.21  "Millipore Retirement Plan" means the Retirement Plan for Employees of
Millipore Corporation, as in effect from time to time.

    1.22  "Millipore Stock Value" means the closing per-share price of Millipore
common stock as listed on the New York Stock Exchange on the last trading day
before the Distribution.

    1.23  "Mykrolis Business" means the Microelectronics business and related
businesses and operation as described in the IPO Registration Statement.

    1.24  "Mykrolis Employee" means any individual who is:  (a) either actively
employed by, or on leave of absence from, Mykrolis on or at any time after the
Separation Date; (b) either actively employed by, or on leave of absence from,
Millipore as either part of a work group or organization, or common support
function that, at any time after the Separation Date and before the Distribution
Date, moves to the employ of Mykrolis from the employ of Millipore; (c) any
other employee or group of employees designated as Mykrolis Employees (as of the
specified date) by Millipore and Mykrolis by mutual agreement; or (d) an
alternate payee under a QDRO, alternate recipient under a QMCSO, beneficiary,
covered dependent, or qualified beneficiary (as such term is defined under
COBRA), in each case, of an employee or former employee, described in (a)
through (c) with respect to that employee's or former employee's benefit under
the applicable Plan(s).  Unless specified otherwise in this Agreement, such an
alternate payee, alternate recipient, beneficiary, covered dependent, or
qualified beneficiary shall not otherwise be considered a Mykrolis Employee with
respect to any benefits he or she accrues or has accrued under any applicable
Plan(s), unless he or she is a Mykrolis Employee by virtue of (a) through (c).

     1.25  "Mykrolis Stock Value" means the (i) opening per-share price of
Mykrolis common stock as listed on the principal exchange on which the shares of
the common stock are then trading on the first trading day after the
Distribution, or if shares are not traded on such Date, then on the next
preceding trading day during which a sale occurred;  (ii) if such common stock
is not traded on an exchange but is quoted on Nasdaq or a successor quotation
system, (1) the last sales price (if the common stock is then listed as a
National Market Issue under the NASD National Market System), or (2) the mean
between the closing representative bid and

                                      -3-
<PAGE>

asked prices (in all other cases) for the common stock on such date as reported
by Nasdaq or such successor quotation system; (iii) if such common stock is not
publicly traded on an exchange and not quoted on Nasdaq or a successor quotation
system, the mean between the closing bid and asked prices for the common stock
on such date as determined in good faith by the Board of Mykrolis; or (iv) the
common stock is not publicly traded, the fair market value established by the
Board of Mykrolis.

    1.26  "Participating Company" means:  (a) Millipore; (b) any Person (other
than an individual) that Millipore has approved for participation in, a Plan
sponsored by Millipore; and (c) any Person (other than an individual) which, by
the terms of such Plan, participates in such Plan or any employees of which, by
the terms of such Plan, participate in or are covered by such Plan.

    1.27  "Person" means an individual, a partnership, a corporation, a limited
liability company, an association, a joint stock company, a trust, a joint
venture, an unincorporated organization, and a governmental entity or any
department, agency or political subdivision thereof.

    1.28  "Plan" means any plan, policy, program, payroll practice, arrangement,
contract, trust, insurance policy, or any agreement or funding vehicle providing
compensation or benefits to employees, former employees, directors or
consultants of Millipore or Mykrolis.

    1.29  "Post-Distribution Period" means, for each designated Plan, the period
beginning as of the Distribution Date and ending on the date that Mykrolis is no
longer using Millipore benefit delivery and administrative services with respect
to the Plan.

    1.30  "QDRO" means a domestic relations order which qualifies under Code
Section 414(p) and ERISA Section 206(d) and which creates or recognizes an
alternate payee's right to, or assigns to an alternate payee, all or a portion
of the benefits payable to a participant under the Millipore Participation Plan
or the Millipore Retirement Plan.

    1.31  "QMCSO" means a medical child support order which qualifies under
ERISA Section 609(a) and which creates or recognizes the existence of an
alternate recipient's right to, or assigns to an alternate recipient the right
to, receive benefits for which a participant or beneficiary is eligible under
any of the Health Plans.

    1.32  "Rabbi Trust," when immediately preceded by "Millipore," means the
grantor trust established for purposes of holding assets under the Millipore
Deferred Compensation Plans.  When immediately preceded by "Mykrolis," "Rabbi
Trust" means the grantor trust to be established by Mykrolis pursuant to Section
4.1(a).

    1.33  "Separation" means the contribution and transfer from Millipore to
Mykrolis, and Mykrolis' receipt and assumption of, directly or indirectly,
substantially all of the assets and liabilities currently associated with the
Mykrolis Business and the stock, investments or similar interests currently held
by Millipore in subsidiaries and other entities that conduct such business.

    1.34  "Separation Date" means the effective date and time of each transfer
of property, assumption of liability, license, undertaking, or agreement in
connection with the Separation

                                      -4-
<PAGE>

which shall, with respect to non-Foreign Plans and U.S. employees, be close of
business, Eastern Standard Time, March 31, 2001 or such other date as may be
fixed by the Board of Directors of Millipore.

     1.35  "Stock Plan," when immediately preceded by "Millipore," means any
plan, program, or arrangement, pursuant to which employees and other service
providers hold stock options, Millipore restricted stock (stock that is subject
to transfer restrictions or to employment and/or performance vesting conditions)
or other Millipore equity incentives.  When immediately preceded by "Mykrolis,"
"Stock Plan" means plans, programs, or arrangements that are substantially
similar to the Millipore Stock Plans, to be established by Mykrolis pursuant to
Article VI.

                                  ARTICLE II

                              GENERAL PRINCIPLES

     2.1   ASSUMPTION OF MYKROLIS LIABILITIES.  Except as specified otherwise in
this Agreement or as mutually agreed upon by Mykrolis and Millipore from time to
time, effective as of Separation Date, Mykrolis hereby assumes and agrees to
pay, perform, fulfill and discharge, in accordance with their respective terms,
all of the following:  (a) all liabilities of, or relating to, Mykrolis
Employees relating to, arising out of, or resulting from future, present or
former employment with the Mykrolis Business (including liabilities relating to,
arising out of, or resulting from Millipore Plans and Mykrolis Plans, other than
any liability for medical coverage for Mykrolis Employees who terminated service
prior to the Separation Date); (b) all liabilities relating to, arising out of,
or resulting from any other actual or alleged employment relationship with
Mykrolis; and (c) all other liabilities relating to, arising out of, or
resulting from obligations, liabilities and responsibilities expressly assumed
or retained by Mykrolis, or a Mykrolis Plan pursuant to this Agreement.  Except
as specified otherwise in this Agreement or as otherwise mutually agreed upon by
Millipore and Mykrolis from time to time, Millipore shall transfer to Mykrolis
amounts equal to trust assets, insurance reserves, and other related assets as
consistent with the applicable Plan transition that relates to, arises out of,
or results from Mykrolis' pro rata interest in each Millipore Plan, to the
extent described herein.

     2.2   MYKROLIS' PARTICIPATION IN MILLIPORE PLANS.

           (a) PARTICIPATION IN MILLIPORE PLANS. Except as specified otherwise
     in this Agreement or as Millipore and Mykrolis may mutually agree, Mykrolis
     Employees shall, until the Separation Date, continue to participate in the
     Millipore Participation Plan (including the 401(k) Plan) and the Millipore
     Retirement Plan, as provided in Article III, and in such other Millipore
     Plans as provided in Articles III through VII.

           (b) MILLIPORE'S GENERAL OBLIGATIONS AS PLAN SPONSOR. To the extent
     that Mykrolis is a Participating Company in any Millipore Plan, Millipore
     shall continue to administer, or cause to be administered, in accordance
     with its terms and applicable law, such Millipore Plan, and shall have the
     sole and absolute discretion and

                                      -5-
<PAGE>

     authority to interpret the Millipore Plan, as set forth therein. Millipore
     shall not amend any Material Feature of any Millipore Plan in which
     Mykrolis is a Participating Company, except to the extent: (i) such
     amendment would not materially affect any coverage or benefits solely with
     respect to Mykrolis Employees under such Plan; or (ii) such amendment is
     necessary or appropriate to comply with applicable law.

           (c) MYKROLIS' GENERAL OBLIGATION AS PARTICIPATING COMPANY. Mykrolis
     shall perform, with respect to its participation in the Millipore Plans,
     the duties of a Participating Company as set forth in each such Plan or any
     procedures adopted pursuant thereto, including (without limitation): (i)
     assistance in the administration of claims, to the extent requested by the
     claims administrator of the applicable Millipore Plan; (ii) full
     cooperation with Millipore Plan auditors, benefit personnel and benefit
     vendors; (iii) preservation of the confidentiality of all financial
     arrangements Millipore has or may have with any vendors, claims
     administrators, trustees, service providers or any other entity or
     individual with whom Millipore has entered into an agreement relating to
     the Millipore Plans; and (iv) preservation of the confidentiality of
     participant information (including, without limitation, health information
     in relation to FMLA leaves) to the extent not specified otherwise in this
     Agreement.

           (d) TERMINATION OF PARTICIPATING COMPANY STATUS. Except as otherwise
     may be mutually agreed upon by Millipore and Mykrolis, effective as of the
     Distribution Date or such other date as Mykrolis establishes a
     corresponding Plan (as specified in this Agreement), Mykrolis shall
     automatically cease to be a Participating Company in the corresponding
     Millipore Plan.

     2.3   ESTABLISHMENT OF MYKROLIS PLANS.

     Except as otherwise provided here, Mykrolis shall adopt certain Plans, as
described in Articles III through VII, as of the Separation Date or such other
date(s) as set out herein or as Millipore and Mykrolis may mutually agree.
Except as specified otherwise in this Agreement, nothing in this Agreement shall
preclude Mykrolis at any time after the Distribution Date, from amending,
merging, modifying, terminating, eliminating, reducing, or otherwise altering in
any respect any Mykrolis Plan, any benefit under any Mykrolis Plan or any trust,
insurance policy or funding vehicle related to any Mykrolis Plans, or any
employment or other service arrangement with the Mykrolis Employees or vendors
(to the extent permitted by law).

     2.4  TERMS OF PARTICIPATION BY MYKROLIS EMPLOYEES IN MYKROLIS PLANS.

          (a)  NON-DUPLICATION OF BENEFITS. Except as specified otherwise in
     the Agreement, as of the Separation Date, or other later date that applies
     to the particular Mykrolis Plan established thereafter, the Mykrolis Plans
     shall be, with respect to Mykrolis Employees, in all respects the
     successors in interest to, and shall not provide benefits that duplicate
     benefits provided by, the corresponding Millipore Plans. Millipore and
     Mykrolis shall agree on methods and procedures, including amending the
     respective

                                      -6-
<PAGE>

     Plan documents, to prevent Mykrolis Employees from receiving
     duplicate benefits from the Millipore Plans and the Mykrolis Plans.

          (b)  SERVICE CREDIT. Except as specified otherwise in this Agreement,
     with respect to Mykrolis Employees, each Mykrolis Plan shall provide that
     all service, all compensation and all other benefit-affecting
     determinations that, as of the Separation Date, were recognized under the
     corresponding Millipore Plan shall, as of the Separation Date, receive full
     recognition and credit and be taken into account under such Mykrolis Plan
     to the same extent as if such items occurred under such Mykrolis Plan,
     except to the extent that duplication of benefits would result. The service
     crediting provisions shall be subject to any respectively applicable
     "service bridging," "break in service," "employment date," or "eligibility
     date" rules under the Mykrolis Plans and the Millipore Plans.

          (c)  ASSUMPTION OF LIABILITIES.  Except as specified otherwise in this
     Agreement (including, without limitation, the exception applicable to self-
     insured long-term disability and workers compensation plans), the
     provisions of this Agreement for the transfer of assets relating to
     Millipore Plans to Mykrolis and/or the appropriate Mykrolis Plans are based
     upon the understanding of the parties that Mykrolis and/or the appropriate
     Mykrolis Plan shall assume all liabilities of the corresponding Millipore
     Plan to or relating to Mykrolis Employees, as provided for herein.

     2.5  BENEFITS COMMITTEE.  From the date of this Agreement through the later
of the Distribution Date or the end of the Post-Distribution Period, as
applicable, the management of the Plans shall be conducted under the supervision
of the Millipore Vice President, Human Resources, and the Mykrolis Vice
President, Human Resources (or his authorized delegate).  Issues that cannot be
resolved by the Benefits Committee shall be decided, at the request of either
party, by a designated representative of the Mykrolis Corporate Executive
Committee and a designated representative of the Millipore Corporate Executive
Committee.

     2.6  FOREIGN PLANS. Mykrolis and Millipore each intend that the matters,
issues or liabilities relating to, arising out of, or resulting from Foreign
Plans and non-U.S.-related employment matters be handled in a manner that is in
compliance with the requirements of applicable local law and, to the extent
permitted by applicable local law, in a manner consistent with comparable U.S.
matters, issues or liabilities as reflected in this Agreement.  Without in any
way limiting the general principle set forth in the preceding sentence, Schedule
2.6 sets forth the manner in which certain existing Millipore Foreign Plans in
non-U.S. jurisdictions shall be handled, effective as of the Separation Date (or
such other date(s)) as Millipore and Mykrolis may mutually agree) consistent
with the provisions of  this Section 2.6 or as permitted under applicable local
law.  To the extent that any existing Millipore Foreign Plan is not contained on
Schedule 2.6 either due to mistake or omission, the parties agree to amend the
Schedule 2.6 to include such Plans. n

     2.7  CERTAIN TRANSFERS OF EMPLOYEES BETWEEN MILLIPORE AND MYKROLIS.  If any
Mykrolis Employee (who was formerly employed by Millipore) is rehired by
Millipore, with the consent of Mykrolis, within the 24-month period following
the Separation Date, all service of such Employee with, and compensation from,
Mykrolis after the Separation

                                      -7-
<PAGE>

Date shall be counted under all applicable Millipore benefit plans as if it were
service with, and compensation from, Millipore, and to the extent practicable,
such Employee shall be treated as if he had not terminated service with
Millipore. If any Millipore Employee is hired by Mykrolis, with the consent of
Millipore, within the 24-month period following the Separation Date, all service
of such Employee with, and compensation from, Millipore before and after the
Separation Date shall be counted under all applicable Mykrolis benefit plans as
if it were service with, and compensation from, Mykrolis, and to the extent
practicable, such Employee shall be treated as if he had transferred employment
to Mykrolis as of the Separation Date.

                                  ARTICLE III

                                  401(k) PLAN

      3.1    401(k) PLAN. Effective as of the Separation Date (or such other
date as Millipore and Mykrolis may mutually agree), Mykrolis shall establish or
cause to be established a separate plan and trust which are intended to be tax-
qualified under Code Section 401(a) and 401(k), to be exempt from taxation under
Code Section 501(a)(1), and to be known as the Mykrolis Savings and Investment
Plan, to which Mykrolis Employees may make salary reduction contributions and
Mykrolis can make matching contributions and discretionary profit sharing
contributions. To the extent that Mykrolis makes a discretionary profit sharing
contribution to the Mykrolis Savings and Investment Plan for 2001, it shall make
such contribution with respect to compensation of plan participants that was
earned from Millipore and Mykrolis during 2001.

      3.2    TRANSFER OF ACCOUNTS FROM MILLIPORE 401(k) PLAN. As soon as
practicable after the Separation Date (or such other date as Millipore and
Mykrolis may mutually agree), Millipore shall cause to be transferred to the
Mykrolis Savings and Investment Plan the accounts in the Millipore 401(k) Plan
that are attributable to Mykrolis Employees.  As a result of the transfer of
such accounts from the Millipore 401(k) Plan, the Mykrolis Savings and
Investment Plan shall hold as part of its assets Millipore employer securities.
Mykrolis shall assume sole responsibility for ensuring that the Mykrolis Savings
and Investment Plan's company stock fund, and the Millipore stock held in such
fund, are maintained in compliance with all requirements of the SEC.  In
addition, effective as of the Separation Date (or such other date as Millipore
and Mykrolis may mutually agree), Millipore shall cause any participant loans
held in the Millipore 401(k) Plan that are attributable to Mykrolis Employees to
be assigned to the Trustee of the Mykrolis Savings and Investment Plan to enable
such MYKROLIS Employees to continue to repay such loans through payroll
deduction, and after such assignment such Mykrolis Employees shall repay such
loans to the Mykrolis Savings and Investment Plan only.

                                  ARTICLE IV

                              NON-QUALIFIED PLANS

      4.1    DEFERRED COMPENSATION PLANS.

             (a) ESTABLISHMENT OF Mykrolis RABBI TRUST. Effective on or before
      the Separation Date (or such other date as Millipore and MYKROLIS may
      mutually

                                      -8-
<PAGE>

     agree), Mykrolis shall establish the Mykrolis Deferred Compensation Plan
     and the Mykrolis Rabbi Trust.

             (b) ALLOCATION AND ASSUMPTION OF LIABILITIES. As of the date that
     Mykrolis establishes the Mykrolis Deferred Compensation Plan, Millipore
     shall determine the amount of liabilities under the Millipore Deferred
     Compensation Plan and the Millipore SERP, attributable to Mykrolis
     Employees. As soon as administratively practicable thereafter, Millipore
     shall pay to Mykrolis or to the trustee of the Mykrolis Rabbi Trust, as
     Mykrolis specified, an amount of Millipore's assets equal to the
     liabilities under the Millipore Deferred Compensation Plan. Coincident with
     the receipt of such transfer of assets, Mykrolis shall assume all
     responsibilities and obligations relating to, arising out of, or resulting
     from such liabilities under the Millipore Deferred Compensation Plan.
     Effective as of the Separation Date, Mykrolis shall also assume all
     responsibilities and obligations relating to, arising out of, or resulting
     from the Millipore SERP to the extent such liabilities are attributable to
     Mykrolis Employees.

             (c) PARTICIPATION IN DEFERRED COMPENSATION PLANS. Effective as of
     the Separation Date (or such other date as Millipore and Mykrolis may
     mutually agree), eligible Mykrolis Employees may commence participation in
     the Mykrolis Deferred Compensation Plan. Mykrolis Employees who are
     currently participating in the Millipore Deferred Compensation Plans shall
     continue their participation in such Plans (according to its terms) to the
     Separation Date (or such other date as Millipore and Mykrolis may mutually
     agree).

                                   ARTICLE V

                           HEALTH AND INSURANCE PLANS

     5.1     HEALTH PLANS.

             (a) MYKROLIS HEALTH PLANS. As of the Distribution Date (or such
     other date(s) and Millipore and Mykrolis may mutually agree), Mykrolis
     shall establish the Mykrolis Health Plans similar to the Millipore Health
     Plans listed on Schedule 5.1 and, correspondingly, Mykrolis shall be solely
     responsible for the administration of the Mykrolis Health Plans, including
     the payment of all employer-related costs in establishing and maintaining
     the Mykrolis Health Plans, and for the collection and remittance of
     employee premiums, subject to Section 9.2.

             (b) MEDICAL PLANS FROM THE SEPARATION DATE THROUGH THE DISTRIBUTION
     DATE. Except as otherwise agreed by Millipore and Mykrolis, for the period
     beginning with the Separation Date and ending on the Distribution Date (or
     such other period as Millipore and Mykrolis may mutually agree), Mykrolis
     shall be a Participating Company in the Millipore Health Plans listed in
     Schedule 5.1. Millipore shall administer claims incurred under the
     Millipore Health Plans by Mykrolis Employees before the Distribution Date,
     but only to the extent that Mykrolis has not, before such date, established
     and assumed administrative responsibility for a

                                      -9-
<PAGE>

     corresponding Health Plan. Any determination made or settlements entered
     into by Millipore with respect to such claims shall be final and binding.
     Millipore shall retain financial and administrative ("run-out") liability
     and all related obligations and responsibilities for all claims incurred by
     Mykrolis Employees before December 31, 2001 (or such other date(s) as
     Millipore and Mykrolis may mutually agree), including any claims that were
     administered by Millipore as of, on, or after December 31, 2001 (or such
     other date(s) as Millipore and Mykrolis may mutually agree). Except as set
     forth in the preceding sentence, Mykrolis shall reimburse Millipore for any
     and all direct and indirect costs and expenses associated with its
     participation in the Millipore Health Plans, subject to Section 9.2.

             (c) SECTION 125 PLAN. Through the Separation Date (or such
     other date as Millipore and Mykrolis may mutually agree), Mykrolis shall
     remain a Participating Company in the Millipore Section 125 Plan. The
     existing elections for Mykrolis Employees participating in the Millipore
     Section 125 Plan shall remain in effect until the Separation Date (or such
     other date as Millipore and Mykrolis may mutually agree). Effective on the
     day after the Separation Date (or such other date immediately following the
     date that Mykrolis' participation in the Millipore Section 125 Plan
     terminates), Mykrolis shall establish, or caused to be established, the
     Mykrolis Section 125 Plan and Mykrolis shall be solely responsible for the
     Mykrolis Section 125 Plan. Millipore will administer, or cause to be
     administered, the Millipore Section 125 Plan for Mykrolis Employees and the
     Mykrolis Section 125 Plan through such date as Millipore and Mykrolis may
     mutually agree. Mykrolis shall reimburse Millipore for any and all direct
     and indirect expenses and costs attributable to Mykrolis Employees, subject
     to Section 9.2. Millipore shall transfer to the Mykrolis Section 125 Plan
     any flexible spending accounts attributable to Mykrolis Employees as soon
     as practicable following the Separation Date.

             (d) HCFA. As of January 1, 2002 (or such other date as Millipore
     and Mykrolis may mutually agree), Mykrolis shall assume all liabilities
     relating to, arising out of, or resulting from claims, if any, under the
     HCFA data match reports that relate to Mykrolis Employees.

             (e) COBRA. Millipore shall be responsible through the Distribution
     Date (or such other date as Millipore and Mykrolis may mutually agree) for
     compliance with the health care continuation coverage requirements of COBRA
     and the Millipore Health and Welfare Plans with respect to Mykrolis
     Employees and qualified beneficiaries (as such term is defined under
     COBRA). Mykrolis shall be responsible for providing Millipore with all
     necessary employee change notices and related information for covered
     dependents, spouses, qualified beneficiaries (as such term is defined under
     COBRA), and alternate recipients pursuant to QMCSO, in accordance with
     applicable Millipore COBRA policies and procedures. As soon as
     administratively practicable after the Distribution Date (or such other
     date as Millipore and Mykrolis may mutually agree), Millipore shall provide
     Mykrolis (through hard copy, electronic format, or such other mechanism as
     is appropriate under the circumstances), with a list of all qualified
     beneficiaries (as such term is defined under COBRA) that relate to Mykrolis
     and the relevant information pertaining to their coverage elections and
     remaining COBRA time

                                      -10-
<PAGE>

     periods. Effective as of the Distribution Date (or such other date as
     Millipore and Mykrolis may mutually agree), Mykrolis shall be solely
     responsible for compliance with the health care continuation coverage
     requirements of COBRA and the Mykrolis Health and Welfare Plans for
     Mykrolis Employees and their qualified beneficiaries (as such term is
     defined under COBRA); provided, however, Mykrolis may elect to retain
     Millipore's services in such manner and for such period as Millipore and
     Mykrolis may mutually agree to assist it with COBRA administration and
     Mykrolis shall reimburse Millipore for its costs and expenses associated
     with such administration, subject to Section 9.2.

     5.2  INSURANCE PLANS

          (a)  MYKROLIS INSURANCE PLANS. Effective as of the Separation Date,
     Mykrolis shall assume and be solely responsible for all liabilities
     relating to, arising out of, or resulting from claims by Mykrolis Employees
     attributable to employment with the Mykrolis Business whether incurred
     before or after the Separation Date. As of the Distribution Date (or such
     other date(s) as Millipore and Mykrolis may mutually agree), Mykrolis shall
     establish Insurance Plans to provide benefits similar to those listed on
     Schedule 5. 2 and, correspondingly, Mykrolis shall be solely responsible
     for the administration of the Mykrolis Insurance Plans, including the
     payment of all employer-related costs in establishing and maintaining the
     Mykrolis Insurance Plans, and for the collection and remittance of employee
     premiums, subject to Section 9.2.

          (b)  INSURANCE PLANS FROM THE SEPARATION DATE THROUGH THE DISTRIBUTION
     DATE. Except as otherwise agreed by Millipore and Mykrolis, for the period
     beginning with the Separation Date and ending on the Distribution Date (or
     such other period as Millipore and Mykrolis may mutually agree), Mykrolis
     shall be a Participating Company in the Millipore Insurance Plans listed in
     Schedule 5.2. Millipore shall administer claims incurred under the
     Millipore Insurance Plans by Mykrolis Employees before the Distribution
     Date but only to the extent that Mykrolis has not, before such date,
     established and assumed administrative responsibility for a corresponding
     Insurance Plan. Any determination made or settlements entered into by
     Millipore with respect to such claims shall be final and binding. Millipore
     shall retain financial and administrative ("run-out") liability and all
     related obligations and responsibilities for all claims incurred by
     Mykrolis Employees before the Distribution Date (or such other date(s) as
     Millipore and Mykrolis may mutually agree), including any claims that were
     administered by Millipore as of, on, or after the Distribution Date (or
     such other date(s) as Millipore and Mykrolis may mutually agree). Except as
     set forth in the preceding sentence, Mykrolis shall reimburse Millipore for
     any and all direct and indirect costs and expenses associated with its
     participation in the Millipore Insurance Plans, subject to Section 9.2.

     5.3  VENDOR ARRANGEMENTS.  Millipore shall use its commercially reasonable
best efforts for and on behalf of Mykrolis to procure, effective as of the
Distribution Date (or such other date(s) as Millipore and Mykrolis may mutually
agree): (i) Health Plans which are comparable in the aggregate in all Material
Features to the Health Plans entered into by Millipore, as set forth in Schedule
5.1; and (ii) group insurance policies, which are comparable in the aggregate in
all Material Features to the group insurance policies entered into by Millipore,

                                      -11-
<PAGE>

as set forth in Schedule 5.2.  In each case, Mykrolis shall, as of Distribution
Date (or such other date as Millipore and Mykrolis may mutually agree)
establish, adopt and/or implement such contracts, agreements or arrangements.

                                  ARTICLE VI

                         EQUITY AND OTHER COMPENSATION

     6.1  CASH PROFIT SHARING PLAN/MANAGEMENT INCENTIVE PLAN. As of the
Separation Date (or such other date as Millipore and Mykrolis Employees may
mutually agree), Mykrolis Employees shall cease active participation in the
Millipore Cash Profit Sharing Plan and Millipore Management Incentive Plan and
shall no longer be entitled to contributions under such plans made with respect
to periods after December 31, 2000.

     6.2  MYKROLIS INCENTIVE PLAN. Effective as of the Separation Date (or such
other date as Millipore and Mykrolis may mutually agree), Mykrolis shall
establish the Mykrolis Incentive Plan. To the extent that Mykrolis makes a
discretionary contribution to the Mykrolis Incentive Plan for the year 2001,
Mykrolis shall make such contribution with respect to compensation of plan
participants that was earned from Millipore and Mykrolis during 2001.

     6.3  MILLIPORE OPTIONS.

          (a)  OPTION ASSUMPTION BY MYKROLIS. At the Distribution Date (or such
     later other date as Millipore and Mykrolis may mutually agree), each
     unvested outstanding Millipore Option held by Mykrolis Employees shall be,
     in connection with the Distribution, assumed by Mykrolis. Each Millipore
     Option so assumed by Mykrolis shall continue to have, and be subject to,
     the same terms and conditions set forth in the Millipore Stock Plan and as
     provided in the respective option agreements governing such Millipore
     Option as of the Distribution Date (or such other date as Millipore and
     Mykrolis may mutually agree), except that (i) such Millipore Option shall
     be exercisable for that number of whole shares of Mykrolis common stock
     equal to the quotient of the number of shares of Millipore common stock
     that were issuable upon exercise of such Millipore Option as of the
     Distribution Date divided by the ratio of the Mykrolis Stock Value to the
     Millipore Stock Value, rounded down to the nearest whole number of shares
     of Mykrolis common stock, and (ii) the per share exercise price for the
     shares of Mykrolis common stock issuable upon exercise of such assumed
     Millipore Option shall be equal to the product determined by multiplying
     the exercise price per share of Millipore common stock at which such
     Millipore Option was exercisable as of the Distribution Date by the Ratio,
     rounded up to the nearest whole cent.

          (b)  ASSUMPTION CRITERIA. The intention of Millipore and Mykrolis is
     that the assumption of Millipore Options by Mykrolis pursuant to Subsection
     6.3(a) meet the following criteria: (i) the aggregate intrinsic value of
     the assumed Millipore Options immediately after the assumption is not
     greater than such value immediately before the assumption; (ii) with
     respect to each such assumed Millipore Option, the ratio of the exercise
     price per share to the Mykrolis Stock Value of the assumed Millipore
     Options

                                      -12-
<PAGE>

     immediately after the assumption is not less than the ratio of the exercise
     price per share to the Millipore Stock Value immediately before the
     assumption; and (iii)  the vesting and option term of the assumed Millipore
     Options shall not be changed.

          (c) VESTED MILLIPORE OPTIONS. Millipore Options that are vested on
     the Distribution Date and the rights of Mykrolis Employees holding such
     vested Millipore Options shall continue to be governed by the terms of the
     Millipore Stock Option Plan, with the Distribution Date being the date of
     termination of employment thereunder for such Mykrolis Employees.

          (d)  CERTAIN NON-U.S. OPTIONEES. Except as may otherwise be agreed
     upon by Millipore and Mykrolis, this Section 6.3 shall govern the treatment
     of Millipore Options held by non-U.S. Mykrolis Employees.

     6.4  MILLIPORE RESTRICTED STOCK.

          (a)  VESTING. Except as otherwise specified herein and subject to the
     terms of the Millipore Stock Plan, on the Distribution Date, Millipore
     restricted stock (including any Mykrolis common stock issued with respect
     to such Millipore restricted stock in connection with the Distribution)
     held by Mykrolis Employees shall become fully vested as of the Distribution
     Date and shall otherwise be subject to the terms of the Millipore Stock
     Plan.
          (b)  CERTAIN NON-U.S. RESTRICTED STOCK HOLDERS. Except as may
     otherwise be agreed upon by Millipore and Mykrolis, this Section 6.4 shall
     govern the treatment of Millipore restricted stock held by non-U.S.
     Mykrolis Employees.

     6.5  EMPLOYEE STOCK PURCHASE PLAN. Mykrolis Employees shall continue to be
eligible for participation in the Millipore Employee Stock Purchase Plan through
the earlier of the IPO Closing Date or the Distribution Date (the "ESPP Date").
Except as otherwise specified herein and subject to the terms of the Millipore
Employee Stock Purchase Plan on the ESPP Date, any funds in an account for a
Mykrolis Employee in the Millipore Employee Stock Purchase Plan as of ESPP Date
shall be refunded to the Mykrolis Employee as soon as practicable after the ESPP
Date.  Effective on or before the ESPP Date (or such other date as Millipore and
Mykrolis may mutually agree), Mykrolis shall establish an employee stock
purchase plan for the benefit of Mykrolis Employees.

                                  ARTICLE VII

                           FRINGE AND OTHER BENEFITS

     7.1  FRINGE BENEFITS:

          (a)  MYKROLIS FRINGE BENEFIT PLANS. Effective as of the Separation
     Date, Mykrolis shall assume and be solely responsible for all liabilities
     relating to, arising out of, or resulting from Mykrolis Employees'
     participation in fringe benefit plans, programs, personnel policies and
     practices of Millipore listed on Schedule 7.1, whether such liabilities are
     incurred before or after the Separation Date. As of the Distribution Date
     (or such other date(s) as Millipore and Mykrolis may mutually agree),
     Mykrolis shall establish Fringe Benefit Plans to provide benefits similar
     to those listed on Schedule 7.1 and, correspondingly, Mykrolis shall be
     solely responsible for the administration of the Mykrolis Fringe Benefit
     Plans, including the payment of all employer-related costs in establishing
     and maintaining the Mykrolis Fringe Benefit Plans subject to Section 9.2.

                                      -13-
<PAGE>

          (b)  FRINGE BENEFIT PLANS FROM THE SEPARATION DATE THROUGH THE
     DISTRIBUTION DATE. Except as otherwise agreed by Millipore and Mykrolis,
     for the period beginning with the Separation Date and ending on the
     Distribution Date (or such other period as Millipore and Mykrolis may
     mutually agree), Mykrolis shall be a Participating Company in the Millipore
     Fringe Benefit Plans listed in Schedule 7.1. Millipore shall administer
     benefits under the Millipore Fringe Benefit Plans for Mykrolis Employees
     before the Distribution Date but only to the extent that Mykrolis has not,
     before such date, established and assumed administrative responsibility for
     a corresponding Fringe Benefit Plan. Mykrolis shall reimburse Millipore for
     any and all direct and indirect costs and expenses associated with its
     participation in the Millipore Fringe Benefit Plans, subject to Section
     9.2.

     7.2  OTHER BENEFIT PLANS:

          (a)  CREDIT UNION. Millipore shall use its commercially reasonable
     best efforts to make the Millipore Credit Union available to Mykrolis
     Employees on substantially similar terms and conditions as are offered to
     current employees of Millipore, through such date as Mykrolis and Millipore
     may mutually agree. Mykrolis shall reimburse Millipore for any and all
     direct and indirect costs and expenses related thereto, subject to Section
     9.2.

          (b)  CAFETERIA AND RELATED SUBSIDIES. Millipore shall continue to make
     its cafeteria, vending machines, and other food or beverage provision
     facilities at the Millipore Bedford campus (collectively, the "Food
     Programs") available to Mykrolis Employees on substantially similar terms
     and conditions as are offered to employees of Millipore, until the
     termination of the occupancy agreements between Millipore and Mykrolis
     regarding Mykrolis' occupancy of the Millipore Bedford campus (or such
     other date as Millipore and Mykrolis may mutually agree). Millipore and
     Mykrolis shall use their commercially reasonable best efforts to mutually
     agree on the appropriate methods and/or processes to ensure continued tax-
     favored status of Millipore's Food Programs under the Code. To the extent
     not otherwise addressed in the occupancy agreements, Mykrolis shall
     reimburse Millipore for any and all direct and indirect costs and expenses
     associated with allowing Mykrolis access to Millipore's Food Programs,
     subject to Section 9.2.

          (c)  MISCELLANEOUS. To the extent that Millipore maintains, sponsors
     or provides benefits other than those specified in Schedule 7.1 to its
     eligible employees, then Millipore shall, to the extent permitted by law,
     continue to make such benefits available to Mykrolis Employees on
     substantially similar terms and conditions as are offered to Millipore
     employees through the Separation Date (or such other date upon which
     Mykrolis and Millipore mutually agree). Mykrolis shall reimburse Millipore
     for any and all direct and indirect costs and expenses associated with,
     arising out of, or resulting from the provision of such other fringe
     benefits.

                                      -14-
<PAGE>

                                 ARTICLE VIII

                 MILLIPORE PARTICIPATION AND RETIREMENT PLANS

     8.1  MILLIPORE PARTICIPATION PLAN. Mykrolis Employees shall continue to
participate in the Millipore Participation Plan until the Separation Date (or
such other date as Millipore and Mykrolis may mutually agree).  As of the
Separation Date(or such other date as Millipore and Mykrolis may mutually
agree), Mykrolis Employees shall cease active participation in the Participation
Plan and shall no longer be entitled to contributions to such Plan made with
respect to periods after December 31, 2000. Mykrolis Employees shall remain
fully vested in their accounts in the Participation Plan and their accounts
shall remain in the Participation Plan until the Distribution Date.  As soon as
possible after the Distribution Date, the benefits under the Millipore
Participation Plan attributable to the Mykrolis Employees shall be distributed
as follows: Mykrolis Employees shall be offered the opportunity at that time to
transfer their accounts in the Millipore Participation Plan to the Millipore
Retirement Plan to purchase an annuity benefit, to the extent they are so
eligible under the terms of the Millipore Retirement Plan, or to receive their
account balances in a lump sum, direct that their accounts be transferred by
direct rollover to the Mykrolis Savings and Investment Plan or any other
eligible retirement plan, or elect to have their account balances retained in
the Millipore Participation Plan, all in accordance with the terms of such
Plans.

     8.2  MILLIPORE RETIREMENT PLAN. As of the Separation Date (or such other
date as Millipore and Mykrolis may mutually agree), Mykrolis Employees shall
cease active participation in the Millipore Retirement Plan and all benefit
accruals attributable to Mykrolis Employees under the Millipore Retirement Plan
shall cease as of that date. All accrued benefits of Mykrolis Employees who are
active on the Separation Date (or such other date as Millipore and Mykrolis may
mutually agree) shall become fully vested as of such date. The accrued benefits
of Mykrolis Employees under the Millipore Retirement Plan (reflecting any offset
for Millipore Participation Plan account balances) shall be determined as of the
Separation Date (or such other date as Millipore and Mykrolis may mutually
agree), and as soon as possible after the Distribution Date, the benefits under
the Millipore Retirement Plan attributable to the Mykrolis Employees shall be
distributed in accordance with the terms of the Millipore Retirement Plan.

     8.3  NO TRANSFER OF ASSETS TO MYKROLIS SAVINGS AND INVESTMENT PLAN. Except
as provided under the direct rollover provisions of the Millipore Participation
Plan and the Millipore Retirement Plan, no assets of such Plans shall be
transferred to or assumed by the Mykrolis Savings and Investment Plan or any
other Mykrolis Plan.

     8.4  MAKE-UP BENEFITS FOR CERTAIN EMPLOYEES. Millipore and Mykrolis agree
to work together to determine the shortfall of retirement benefits that certain
employees will experience in the five years following the Separation Date as the
result of their change of employment from Millipore to Mykrolis and to determine
a fair adjustment of benefits to be paid such employees through additional
contributions to the Mykrolis Savings and Investment Plan.

                                      -15-
<PAGE>

                                  ARTICLE IX

                           ADMINISTRATIVE PROVISIONS

     9.1  TRANSITIONAL SERVICES AGREEMENT. On or prior to the Separation Date
(or such other date as Mykrolis and Millipore may mutually agree), Millipore and
Mykrolis may enter into a services agreement covering the provisions of interim
services, including financial, accounting, legal, benefits-related and other
services (including inter alia assistance with the establishment of Mykrolis
                    ----- ----
plans as described above) by Millipore to Mykrolis or, in certain circumstances,
vice versa, if appropriate or necessary.

     9.2  PAYMENT OF LIABILITIES, PLAN EXPENSES AND RELATED MATTERS.

          (a)  EXPENSES AND COSTS CHARGEABLE TO A TRUST. Effective as of the
     Separation Date, Mykrolis shall pay its share of any contributions made to
     any trust maintained in connection with a Millipore Plan while Mykrolis is
     a Participating Company in that Millipore Plan.

          (b)  CONTRIBUTIONS TO TRUSTS. With respect to Millipore Plans to which
     Mykrolis Employees make contributions, Millipore shall use reasonable
     procedures to determine Mykrolis assets and liabilities associated with
     each such Plan, taking into account such contributions, settlements,
     refunds and similar payments.

          (c)  ADMINSTRATIVE EXPENSES NOT CHARGEABLE TO A TRUST. Effective as of
     the Separation Date, to the extent not charged pursuant to a transitional
     services agreement (as contemplated by Section 9.1), and to the extent not
     otherwise agreed to in writing by Millipore and Mykrolis, and to the extent
     not chargeable to a trust established in connection with a Millipore Plan
     (as provided in paragraph (a)), Mykrolis shall be responsible, through
     either direct payment or reimbursement to Millipore, for its allocable
     share of actual third party and/or vendor costs and expenses incurred by
     Millipore and additional costs and expenses, subject to the methodology
     reasonably agreed upon by Millipore and Mykrolis, in the administration of
     (i) the Millipore Plans while Mykrolis participates in such Millipore
     Plans, and (ii) the Mykrolis Plans, to the extent Millipore procures,
     prepares, implements and/or administers such Mykrolis Plans. To the extent
     not otherwise determinable through direct allocation of costs and expenses,
     Mykrolis' allocable share of such costs and expenses will be based on
     Mykrolis Revenue as a percentage of total Millipore Revenue.

     9.3  TRANSITIONAL STAFFING SERVICES.  Millipore shall provide certain
transitional staffing services and other services as Millipore and Mykrolis may
mutually agree to Mykrolis in such manner and for such period as Millipore and
Mykrolis may mutually agree. Mykrolis shall reimburse Millipore for any and all
direct and indirect costs and expenses related thereto.

     9.4  SHARING OF PARTICIPANT INFORMATION. In addition to the
responsibilities and obligations of Millipore and Mykrolis specified in this
Agreement, Millipore

                                      -16-
<PAGE>

and Mykrolis shall share, or cause to be shared, all participant information
that is necessary or appropriate for the efficient and accurate administration
of each of the Millipore Plans and the Mykrolis Plans during the respective
periods applicable to such Plans (as Mykrolis and Millipore may mutually agree).
Millipore and Mykrolis and their respective authorized agents shall, subject to
applicable laws of confidentiality and data protection, be given reasonable and
timely access to, and may make copies of, all information relating to the
subjects of this Agreement in the custody of the other party or its agents, to
the extent necessary or appropriate for such administration.

     9.5  REPORTING AND DISCLOSURE COMMUNICATIONS TO PARTICIPANTS. While
Mykrolis is a Participating Company in the Millipore Plans, Mykrolis shall take,
or cause to be taken, all actions necessary or appropriate to facilitate the
distribution of all Millipore Plan-related communications and materials to its
employees, participants and beneficiaries, including (without limitation)
summary plan descriptions and related summaries of material modification(s),
summary annual reports, investment information, prospectuses, notices and
enrollment material for the Millipore Plans and Mykrolis Plans. Mykrolis shall
reimburse Millipore for the costs and expenses relating to the copies of all
such documents provided to Mykrolis. Mykrolis shall assist Millipore in
complying with all reporting and disclosure requirements of ERISA, including the
preparation of Form Series 5500 annual reports for the Millipore Plans, as
applicable.

     9.6  AUDITS REGARDING VENDOR CONTRACTS. From the period beginning as of the
Separation Date and ending on December 31, 2001 (or such later date as Millipore
and Mykrolis may mutually agree), Millipore and Mykrolis and their duly
authorized representatives shall have the right to conduct joint audits with
respect to any vendor contracts that relate to both the Millipore Health and
Welfare Plans and the Mykrolis Health and Welfare Plans. The scope of such
audits shall encompass the review of all correspondence, account records, claim
forms, cancelled drafts (unless retained by the bank), provider bills, medical
records submitted with claims, billing corrections, vendor's internal
corrections of previous errors and any other documents or instruments relating
to the services performed by the vendor under the applicable vendor contracts.
Millipore and Mykrolis shall agree on the performance standards, audit
methodology, auditing policy and quality measures, reporting requirements, and
the manner in which costs and expenses incurred in connection with such audits
shall be shared.

     9.7  EMPLOYEE IDENTIFICATION NUMBERS. Until the Distribution Date (or such
other period as Millipore and Mykrolis may mutually agree), Millipore and
Mykrolis shall not change any employee identification numbers assigned by
Millipore. Millipore and Mykrolis mutually agree to establish a policy pursuant
to which employee identification numbers assigned to either employees of
Millipore or Mykrolis shall not be duplicated between Millipore and Mykrolis.

     9.8  BENEFICIARY DESIGNATIONS. Subject to Section 9.11, all beneficiary
designations made by Mykrolis Employees for the Millipore Plans shall be
transferred to and be in full force and effect under the corresponding Mykrolis
Plans, in accordance with the terms of each such applicable Mykrolis Plan, until
such beneficiary designations are replaced or revoked by the Mykrolis Employees
who made the beneficiary designations.

                                      -17-
<PAGE>

     9.9   REQUESTS FOR REGULATORY OPINIONS. Millipore and Mykrolis shall make
such applications to regulatory agencies, including the Internal Revenue Service
and Department of Labor, as may be necessary or appropriate. Mykrolis and
Millipore shall cooperate fully with one another on any issue relating to the
transactions contemplated by this Agreement for which Millipore and/or Mykrolis
elects to seek a determination letter or private letter ruling from the Internal
Revenue Service or an advisory opinion from the Department of Labor.

     9.10  FIDUCIARY MATTERS. Millipore and Mykrolis each acknowledge that
actions contemplated to be taken pursuant to this Agreement may be subject to
fiduciary duties or standards of conduct under ERISA or other applicable law,
and that no party shall be deemed to be in violation of this Agreement if such
party fails to comply with any provisions hereof based upon such party's good
faith determination that to do so would violate such a fiduciary duty or
standard.

     9.11  CONSENT OF THIRD PARTIES. If any provision of this Agreement is
dependent on the consent of any third party (such as a vendor) and such consent
is withheld, Millipore and Mykrolis shall use their commercially reasonable best
efforts to implement the applicable provisions of this Agreement. If any
provision of this Agreement cannot be implemented due to the failure of such
third party to consent, Millipore and Mykrolis shall negotiate in good faith to
implement such provision in a mutually satisfactory manner.

     9.12  MILLIPORE INTRANET. Through the Distribution Date (or such other date
as Mykrolis and Millipore may mutually agree), Millipore shall make its
Millipore intranet site available to Mykrolis Employees. Mykrolis shall
reimburse Millipore for any and all costs and expenses related to making its
intranet site available to Mykrolis Employees, subject to any transitional
services agreement (as contemplated by Section 9.1). Millipore and Mykrolis
shall use their commercially reasonable best efforts to mutually agree on the
appropriate methods by which Mykrolis shall establish its own intranet site.

                                   ARTICLE X

                           EMPLOYMENT-RELATED MATTERS

     10.1  TERMS OF MYKROLIS EMPLOYMENT.  All basic terms and conditions of
employment for Mykrolis Employees including, without limitation, their pay and
benefits in the aggregate, shall, to the extent legally and practicably
possible, remain substantially the same through the Distribution Date as the
terms and conditions that were in place when the Mykrolis Employee or Mykrolis
Employee was employed by Millipore, as applicable.  Notwithstanding the
foregoing, Mykrolis Employees shall be required to execute a new agreement
regarding confidential information and proprietary developments in a form
approved by Mykrolis by the Distribution Date.  In addition, nothing in this
Agreement shall be construed to change the at-will status of the employment of
any of the employees of the Millipore or Mykrolis.

                                      -18-
<PAGE>

     10.2  HR DATA SUPPORT SYSTEMS. Millipore shall provide human resources data
support for Mykrolis Employees through December 31, 2001 (or such other period
as Millipore and Mykrolis may mutually agree). Mykrolis agrees to fully
reimburse Millipore for any and all direct and indirect costs and expenses
associated with its use of the Millipore human resources data support systems,
subject to Section 9.2. In the event that Millipore and Mykrolis agree to extend
the time period beyond December 31, 2001, then the costs and expenses shall be
computed in accordance with Section 9.2. Millipore and Mykrolis each reserves
the right to discontinue Mykrolis' access to any Millipore human resources data
support systems with sixty (60) days' notice (or such other period as Millipore
and Mykrolis may mutually agree).

     10.3  EMPLOYMENT OF EMPLOYEES WITH U.S. WORK VISAS. Mykrolis shall request
amendments to the nonimmigrant visa status of Mykrolis Employees with U.S. work
visas authorizing them to work for Millipore, to request authorization to work
for Mykrolis.

     10.4  CONFIDENTIALITY AND PROPRIETARY INFORMATION.  No provision of this
Agreement shall be deemed to release any individual for any violation of the
Millipore non-competition guideline or any agreement or policy pertaining to
confidential or proprietary information of Millipore, or otherwise relieve any
individual of his or her obligations under such non-competition guideline,
agreement, or policy.

     10.5  PERSONNEL RECORDS. Subject to applicable laws on confidentiality and
data protection, Millipore shall deliver to Mykrolis prior to the Separation
Date (or such other date as Millipore and Mykrolis may mutually agree),
personnel records of Mykrolis Employees to the extent such records relate to
Mykrolis Employees' active employment by, leave of absence from, or termination
of employment with Mykrolis. Mykrolis shall fully reimburse Millipore for any
and all direct and indirect costs and expenses associated with such delivery,
subject to Section 9.2.

     10.6  MEDICAL RECORDS. Subject to applicable laws on confidentiality and
data protection, Millipore shall deliver to Mykrolis prior to the Separation
Date (or such other date as Millipore and Mykrolis may mutually agree), medical
records of Mykrolis Employees to the extent such records (a) relate to Mykrolis
Employees' active employment by, leave of absence from, or termination of
employment with Mykrolis. Mykrolis shall fully reimburse Millipore for any and
all direct and indirect costs and expenses associated with such delivery,
subject to Section 9.2.

     10.7  UNEMPLOYMENT INSURANCE PROGRAM. Unless otherwise directed by
Mykrolis, Millipore shall use its commercially reasonable best efforts to cause
Mykrolis to receive service from Millipore's third party unemployment insurance
administrator through December 31, 2001 (or such other date as Millipore and
Mykrolis may mutually agree). Mykrolis shall reimburse Millipore for its
allocable share of fees paid and related costs and expenses by Millipore to its
third party unemployment insurance administrator for services rendered during
such period, pursuant to the Master Transitional Services Agreement. Mykrolis
shall cooperate with the unemployment insurance administrator by providing any
and all necessary or appropriate information reasonably available to Mykrolis.

                                      -19-
<PAGE>

     10.8  NON-TERMINATION OF EMPLOYMENT; NO THIRD-PARTY BENEFICIARIES. No
provision of this Agreement shall be construed to create any right or accelerate
entitlement to any compensation or benefit whatsoever on the part of any
Mykrolis Employee, Mykrolis Employee or other former, present or future employee
of Millipore or Mykrolis under any Millipore Plan or Mykrolis Plan or otherwise.
Without limiting the generality of the foregoing: (a) neither the Distribution
or Separation, nor the termination of the Participating Company status of
Mykrolis shall cause any employee to be deemed to have incurred a termination of
employment; and (b) no transfer of employment between Millipore and Mykrolis
before the Distribution Date shall be deemed a termination of employment for any
purpose hereunder.

     10.9  EMPLOYMENT LITIGATION.

           (a)  CLAIMS TO BE TRANSFERRED TO MYKROLIS AND/OR JOINTLY DEFENDED BY
     MILLIPORE AND MYKROLIS. As of the Separation Date (or such other date as
     Millipore and Mykrolis may mutually agree), Millipore and Mykrolis shall
     enter into a written agreement that specifies the legal responsibility and
     accompanying liability for identified claims of Mykrolis.

           (b)  UNSCHEDULED CLAIMS. Mykrolis shall have the sole responsibility
     for all employment-related claims regarding Mykrolis Employees that exist,
     or come into existence, on or after the Separation Date relating to,
     arising out of, or resulting from their employment with Mykrolis.

                                  ARTICLE XI

                              GENERAL PROVISIONS

     11.1  EFFECT IF SEPARATION, IPO AND/OR DISTRIBUTION DOES NOT OCCUR. Subject
to Section 11.9, if the Separation, IPO and/or Distribution does not occur, then
all actions and events that are, under this Agreement, to be taken or occur
effective as of the Separation Date, IPO and/or Distribution, shall not be taken
or occur except to the extent specifically agreed to by Mykrolis and Millipore.

     11.2  RELATIONSHIP OF PARTIES. Nothing in this Agreement shall be deemed or
construed by the parties or any third party as creating the relationship of
principal and agent, partnership or joint venture between the parties, the
understanding and agreement being that no provision contained herein, and no act
of the parties, shall be deemed to create any relationship between the parties
other than the relationship set forth herein.

     11.3  AFFILIATES. Each of Millipore and Mykrolis shall cause to be
performed and hereby guarantee the performance of any and all actions of
Millipore (and its affiliates) or Mykrolis (and its affiliates), respectively.

     11.4  GOVERNING LAW. To the extent not preempted by applicable federal law,
including, without limitation, ERISA, the Code and applicable securities laws,
this Agreement shall be governed by, construed and interpreted in accordance
with the laws of the

                                      -20-
<PAGE>

Commonwealth of Massachusetts, as to all matters, including matters of validity,
construction, effect, performance and remedies.

     11.5   ASSIGNMENT. This Agreement shall inure to the benefit of and be
binding upon the parties hereto and their respective legal representatives and
successors, and nothing in this Agreement, express or implied, is intended to
confer upon any other Person any rights or remedies of any nature whatsoever
under or by reason of this Agreement. This Agreement may be enforced separately
by Millipore and Mykrolis. Neither party may assign this Agreement or any rights
or obligations hereunder, without the prior written consent of the other party,
and any such assignment shall be void; provided, however, either party may
assign this Agreement to a successor entity in conjunction with such party's
reincorporation.

     11.6   SEVERABILITY. If any term or other provision of this Agreement is
determined to be invalid, illegal or incapable of being enforced by any rule of
law or public policy, all other conditions and provisions of this Agreement
shall nevertheless remain in full force and effect so long as the economic or
legal substance of the transactions contemplated hereby is not affected in any
manner materially adverse to either party. Upon such determination that any term
or other provision is invalid, illegal or incapable of being enforced, the
parties hereto shall negotiate in good faith to modify this Agreement so as to
effect the original intent of the parties as closely as possible and in an
acceptable manner to the end that transactions contemplated hereby are fulfilled
to the fullest possible extent.

     11.7   INTERPRETATION. The headings contained in this Agreement or any
Schedule hereto and in the table of contents to this Agreement are for reference
purposes only and shall not affect in any way the meaning or interpretation of
this Agreement. Any capitalized term used in any Schedule but not otherwise
defined therein shall have the meaning assigned to such term in this Agreement.
When a reference is made in this Agreement to an Article, Section or Schedule,
such reference shall be to an Article of, Section of, or Schedule to this
Agreement unless otherwise indicated.

     11.8   AMENDMENT. The Board of Directors of Mykrolis and Millipore may
mutually agree to amend the provisions of this Agreement at any time or times,
for any reason, either prospectively or retroactively, to such extent and in
such manner as the Boards mutually deem advisable. Each Board may delegate its
amendment power, in whole or in part, to one or more Persons or committees as it
deems advisable. The Chief Executive Officer of Millipore and the Chief
Executive Officer of Mykrolis have full power and authority to mutually adopt an
amendment to this Agreement (subject to each of their authority to amend Plans).
No change or amendment shall be made to this Agreement, except by an instrument
in writing signed by authorized individuals.

     11.9   TERMINATION. This Agreement may be terminated and the Distribution
abandoned at any time prior to the IPO Closing Date by and in the sole
discretion of Millipore without the approval of Mykrolis. This Agreement may be
terminated at any time after the IPO Closing Date and before the Distribution
Date by mutual consent of Millipore and Mykrolis. In the event of termination
pursuant to this Section, no party shall have any liability of any kind to the
other party.

                                     -21-
<PAGE>

     11.10  CONFLICT. In the event of any conflict between the provisions of
this Agreement and any Plan, the provisions of this Agreement shall control.

     11.11  COUNTERPARTS. This Agreement, including the Schedules hereto and the
other documents referred to herein, may be executed in counterparts, each of
which shall be deemed to be an original, but all of which together shall
constitute one and the same agreement.

            IN WITNESS WHEREOF, each of the parties have caused this Employee
Matters Agreement to be executed on its behalf by its officers hereunto duly
authorized on the day and year first above written.

                                        MILLIPORE CORPORATION

                                        By: /s/ Francis J. Lunger
                                           ---------------------------------

                                        Name:  Francis J. Lunger
                                               -----------------------------

                                        Title: Executive Vice President
                                               -----------------------------

                                        MYKROLIS CORPORATION

                                        By: /s/ Jean-Marc Pandraud
                                           ---------------------------------

                                        Name:  Jean-Marc Pandraud
                                               -----------------------------

                                        Title: President
                                               ----------------------------

                                     -22-
<PAGE>

EMPLOYEE MATTERS AGREEMENT
BETWEEN MILLIPORE CORPORATION
AND MYKROLIS CORPORATION

     Schedule 2.6:

     (a) The following is a list of  plans and benefits to be transferred from
Millipore to Mykrolis  from and after the Separation Date (or such other
date(s)) as Millipore and Mykrolis may mutually agree) for Mykrolis Transferred
Employees in those countries listed below, in accordance with the provisions of
the Agreement:

     France:
     -------

          .    Retirement Program: (1) Government-mandated industrywide defined
               ------------------
contribution plan; (2) AGIRC and ARRCO (manadatory complementary "pay-as-you-go"
pension plan); and (3) Retirement Bonus (mandatory defined benefit amount
if/when the employee retires with the company, based on salary and years of
service)

          .    Insurances (Medical/ Life/Disability): (1) Government-mandated;
               -------------------------------------
and (2) Employer provided supplemental coverage through group insurance
contracts;

          .    Business Travel Accident Insurance: Employer-provided through
               ----------------------------------
group insurance contract

          .    Profit Sharing Plan: Employer-provided based on Company
               -------------------
performance

          .    Company Savings Plan: Employee can invest through salary
               --------------------
withdrawal.  Tax effective treatment on gains if held 5 years.

          .    13/th/ Month Pay Practice: Government-mandated
               -------------------------

          .    Vacation: Government mandated (based on years of service)
               --------

          .    Continuation of ARTT Agreement - "35 hours rule" - Government-
               -----------------------------------------------
mandated

          .    Allowance(s): Employer-provided subsidized lunch and
               ------------
transportation (car policy for certain members of management)

          .    Seniority Awards: Based on years of service
               ----------------

          .    Bonus Program: Employer-provided for specific work schedules or
               -------------
work conditions (e.g., shift bonus, night bonus)

                                     -23-
<PAGE>

EMPLOYEE MATTERS AGREEMENT
BETWEEN MILLIPORE CORPORATION
AND MYKROLIS CORPORATION

     Schedule 2.6 (a) (continued):

     Germany:
     --------

          .    Retirement Program: (1) Government-mandated (includes life
               ------------------
insurance benefit); (2) Employer-provided defined benefit pension plan; and (3)
Employer-provided contribution to Government-approved savings plan

          .    Medical: Government-mandated health care and short term
               -------
disability benefits under national health system

          .    Insurance (Life/Disability/Business Travel Accident): Employer-
               ---------------------------------------------------
provided via industry-wide insurance program

          .    Vacation: Government mandated (based on years of service)
               --------

          .    Sales Incentive Plan: Employer-provided for certain sales
               --------------------
personnal

          .    Seniority Awards: Employer-provided
               ----------------

          .    Allowances:  Employer-provided subsidized lunch
               ----------

          .    Employee Referral Bonus Plan: Employer-provided
               ----------------------------

          .    Employees Stock Purchase Plan: Employer-provided
               -----------------------------

     China (Millipore China  Ltd. - Hong Kong):
     ------------------------------------------

          .    Retirement Program: Government-mandated defined contribution plan
               ------------------

          .    Medical: Government-mandated health benefits under national
               -------
health system

          .    Insurance (Life/Death/Disability): Employer-provided via
               ---------------------------------
industry-wide insurance program

          .    Seniority Awards:  Employer-provided
               -----------------

          .    Medical: Government-mandated health benefits under national
               -------
health system

          .    Insurance (Life/Disability/Business Travel/Accident): Employer-
               ----------------------------------------------------
provided through group insurance contract

                                     -24-
<PAGE>

EMPLOYEE MATTERS AGREEMENT
BETWEEN MILLIPORE CORPORATION
AND MYKROLIS CORPORATION

  Schedule 2.6(a)  -(Millipore China Ltd. - Hong Kong) (continued):

          13/th/ Month Pay Practice: Government-mandated
          --------------------------

          Seniority Awards: Employer-provided
          -----------------

          Bonus Plan: Government-mandated
          -----------

          Allowances (Meals/transportation, etc.):  Governed by law
          ---------------------------------------

  Schedule 2.6 (continued)

     (b) The following plans and benefits will continue with the current
subsidiary (which will be a subsidiary of Mykrolis) from and after the
Separation Date (or such other date(s)) as Millipore and Mykrolis may mutually
agree) and the following plans and benefits will be transferred to the new
Millipore subsidiary in those countries listed below, in accordance with the
provisions of the Agreement:

  United Kingdom:
  ---------------

          Retirement Plan: Millipore Transfer Plan (hybrid money purchase
          ---------------
     scheme) (includes life insurance benefit).

          Medical: (1) Government-mandated and (2) Employer-provided
          -------
     supplemental medical and dental insurance

          Flexible Benefits Program: Employer-provided
          --------------------------

          Insurance (Life/Disability/Business Travel Accident): Employer-
          -----------------------------------------------------
     provided through group insurance contracts

          Vacation:  Government-mandated
          ---------

          Sales Incentive Plan: Employer-provided for certain sales personnel
          ---------------------

          Seniority Awards: Employer-provided
          -----------------

          Allowances:  Employer- provided subsidized lunch
          -----------

                                     -25-
<PAGE>

EMPLOYEE MATTERS AGREEMENT
BETWEEN MILLIPORE CORPORATION
AND MYKROLIS CORPORATION

     Schedule 2.6 (b) (continued):

     Japan:
     -------

          .    Retirement Program: Government-mandated defined benefit plan
               -------------------
     (includes life insurance and disability insurance benefits)

          .    Medical: Government-mandated health benefits under national
               --------
     health system

          .    Insurance (Life/Disability/Business Travel Accident):  Employer-
               -----------------------------------------------------
     provided supplemental coverage through industrywide insurance risk pool

          .    Vacation:  Governed by law
               ---------

          .    Pay Practices: Annual salary divided into 16 payments - 2
               --------------
     months bonus paid in June; 2 months bonus paid in December

          .    Allowance(s) (Meals/transportation, etc.):  Governed by law
               ------------------------------------------

     Hong Kong:
     ----------

          .    Retirement Program:  Government-mandated deferred contribution
               -------------------
     plan

          .    Medical: Government-mandated health benefits under national
               --------
     health system

          .    Insurance (Life/Disability/Business Travel/Accident): Employer-
               ------------------------------------------------------
     provided through group insurance contract

          .    13/th/ Month Pay Practice: Government-mandated
               -------------------------

          .    Seniority Awards: Employer-provided
               -----------------

          .    Bonus Plan: Government-mandated (pay practice)
               -----------

          .    Allowances (Meals/Transportation, etc.):  Governed by law
               ---------------------------------------

                                     -26-
<PAGE>

EMPLOYEE MATTERS AGREEMENT
BETWEEN MILLIPORE CORPORATION
AND MYKROLIS CORPORATION

  Schedule 2.6 (b) (continued):

  Korea
  -----

          .    Retirement Program: Government-mandated defined benefit
               -------------------

          .    Medical: (1) Government-mandated health benefits under national
               --------
     health care system; and (2) Employer-provided supplemental health care
     benefit

          .    Insurance (Group term life/Accidental Death/Disability):
               --------------------------------------------------------
     Employer-provided via group insurance contract

          .    13/th/ month pay practice (includes Government-mandated
               -------------------------------------------------------
     guaranteed bonus plan)
     ----------------

          .    Cash Profit Sharing: Employer-provided based on Company
               --------------------
     performance

          .    Sales/Incentive Plans:  Employer-provided for eligible employees
               ----------------------

          .    Allowances (Meals/transportation, etc.):  Governed by law
               ----------------------------------------

  Malaysia
  --------

          .    Retirement Program: Government mandated
               -------------------

          .    Insurance (Medical/Life/Disability):  Employer provided via
               -------------------------------------
     industrywide insurance risk pool

          .    Insurance (Business Travel Accident):  Employer provided
               -------------------------------------
     supplemental coverage under U.S. worldwide corporate insurance program

          .    Vacation:  Governed by law
               ---------

          .    Seniority Awards: Employer-provided
               -----------------

          .    13/th/ Month Pay Practice: Government-mandated
               --------------------------

          .    Allowances (Meals/Transportation, etc.):  Governed by law
               ----------------------------------------

          .    Sales Incentive Plan: Employer-provided for certain sales
               ---------------------
     personnel

                                     -27-
<PAGE>

EMPLOYEE MATTERS AGREEMENT
BETWEEN MILLIPORE CORPORATION
AND MYKROLIS CORPORATION

  Schedule 2.6 (b) (continued):

  Singapore
  ---------

          .    Retirement Program:  Government-mandated
               -------------------

          .    Insurance (Medical/lLife/Disability/Business Travel Accident):
               --------------------------------------------------------------
     Employer- provided via industry-wide insurance risk pool

          .    Seniority Awards: Employer-provided
               -----------------

          .    Allowances (Mealsl/Transportation, etc.)  Governed by law
               ----------------------------------------

  Taiwan
  ------

          .    Retirement Program:  (1) Government mandated; and (2) Employer-
               -------------------
     provided defined benefit plan

          .    Insurance (Medical/Life/Disability/Business Travel Accident:
               ------------------------------------------------------------
     Employer-provided via industry-wide insurance risk pool

          .    Bonus Plan: Government-mandated
               -----------

          .    Allowances (Meals/Transportation, etc.): Governed by law
               ----------------------------------------

                                     -28-
<PAGE>

EMPLOYEE MATTERS AGREEMENT
BETWEEN MILLIPORE CORPORATION
AND MYKROLIS CORPORATION

Schedule 5.1  Millipore Health Plans
------------------------------------

     I.   Health Plans
          ------------

     HMOs (health maintenance organizations)

     Aetna U. S. Healthcare

          Tufts

          Harvard Pilgrim Health Care

          Matthew Thornton Blue

          CIGNA/Healthsource

          Fallon

          Kaiser Permanente

     PPO (Preferred Provider Organization)

          CIGNA

     POS (Point of Service)

          Tufts

     Other Medical (Indemnity Plan)

          CIGNA

     Other Medical (Dental)

          Delta Dental

                                     -29-
<PAGE>

EMPLOYEE MATTERS AGREEMENT
BETWEEN MILLIPORE CORPORATION
AND MYKROLIS CORPORATION

Schedule 5.1  Millipore Health Plans  (continued)
-------------------------------------------------

     II.  Section 125 Plan (pre-tax payment plan):
          ----------------------------------------

          Health Care Spending Account

          Dependent Care Spending Account (Pre-tax employee premium payments for
     coverage selections under (I) and (II) above)

Schedule 5.2  Millipore Insurance Plans
---------------------------------------

          Long Term Disability

          Group Life/Accidental Death & Dismemberment

          Contributory Accidental Death & Dismemberment

          Business Travel Accident

          Workers' Compensation

Schedule 7.1  Millipore Fringe Benefit Plans
--------------------------------------------

          Employee Assistance Program

          Paid Absence (sick time/short-term disability; paid portion of FMLA;
          bereavement, etc.)

          Vacation

          Holiday

          Leaves of Absence, including sabbaticals (unpaid)

          Adoption Assistance

          Life Balance Resources

          Employee Referral program

          Jury Duty

                                     -30-
<PAGE>

EMPLOYEE MATTERS AGREEMENT
BETWEEN MILLIPORE CORPORATION
AND MYKROLIS CORPORATION

Schedule 7.1  Millipore Fringe Benefit Plans  (continued)
---------------------------------------------------------

          Credit Union

          Matching Gift (Millipore Charitable Foundation)

          Vacation Buy/Sell program

          Cafeteria and related subsidies

          Financial Planning

          Service Awards

          Relocation assistance

          Intern/co-op program

          Flex time/job sharing/part time

                                     -31-

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00028-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00028-of-00352.parquet"}]]