Document:

<PAGE>
                                                                EXHIBIT 10 (p.2)

Note: Certain portions of this document have been marked "[c.i.]" to indicate
that confidential treatment has been requested for this confidential
information. The confidential portions have been omitted and filed separately
with the Securities and Exchange Commission.

                SECOND AMENDMENT TO PURCHASE AND SUPPLY AGREEMENT

This Second Amendment to Purchase and Supply Agreement (the "Second Amendment"),
effective as of July 27, 2001, is made by and between DUSA Pharmaceuticals,
Inc., a New Jersey corporation, having offices at 25 Upton Drive, Wilmington,
Massachusetts 01887 ("DUSA") and North Safety Products, Inc., a Delaware
corporation and unit of Norcross Safety Products L.L.C., having offices at 2000
Plainfield Pike, Cranston, Rhode Island 02921 ("NSP").

Whereas, DUSA and NSP are parties to a Purchase and Supply Agreement effective
as of September 13, 1999 (the "Agreement") which was amended effective as of
February 15, 2001 (the "Amendment"); and

Whereas, the parties wish to further amend the Agreement upon the terms and
conditions set forth in this Second Amendment for good and valuable
consideration which is hereby acknowledged.

Now, Therefore, in consideration of the covenants, conditions, and undertakings
hereinafter set forth, the parties mutually agree as follows:

1. Amend Article II Supply by deleting Section 2.4.3, Underutilization Fee, in
   the Amendment and replace it as follows:

Section 2.4.3.  Underutilization Fee

     (a)  The parties recognize that orders for DUSA's Kerastick(R) have not
          been at unit levels as originally anticipated by the parties. DUSA
          agrees, therefore, to compensate NSP in the form of an
          under-utilization fee, as follows:

           (i)  One Million Dollars ($1,000,000) upon execution of this Second
                Amendment

           (ii) One Hundred Thousand Dollars ($100,000) on or before September
                1, 2001, subject to written confirmation of the final validation
                for the isolation room constructed for the Attest product line.

           (iii) Payments of One Hundred Thousand Dollars ($100,000) on or
                before the following dates: December 31, 2001; June 30, 2002;
                December 31, 2002.

           (iv) Subject to Sub-Paragraph 2.4.3(b) below, up to Five Hundred
                Thousand Dollars ($500,000) in the event DUSA exercises its
                right to extend the Term until June 30, 2003, payable in three
                installments on December 31, 2002, March 31, 2003 and July 10,
                2003. Such fees shall be calculated as determined by the formula
                in Sub-Paragraph 2.4.3(b) below.

     (b)  If DUSA has not ordered any Kerastick(R) units during the period
          July 1, 2001 through June 30, 2003, DUSA shall pay the
          under-utilization fee of Five Hundred Thousand Dollars ($500,000) set
          forth in Sub--Paragraph 2.4.3 (a) above . If DUSA has ordered [c.i.]
          Kerastick(R) units during the period July 1, 2001 through June 30,
          2003, no payment shall be due to NSP. If DUSA orders less than [c.i.]
          Kerastick(R) units during the period July 1, 2001 through June 30,
          2003, then the amount due to NSP shall be calculated on [c.i.] by
          comparing the number of units manufactured during the period to [c.i.]
          to determine the percentage of utilization. The percentage of
          under-utilization shall be equal to [c.i.] minus the percentage of
          utilization and shall be multiplied by $500,000. In the event DUSA has
          not ordered any Kerastick(R) units during the period July 1, 2001
          through December 31, 2002, DUSA shall make an advance against any
          payment due under this paragraph in the amount of One Hundred Sixty
          Seven Thousand Dollars ($167,000). Similarly, if DUSA has not ordered
          any Kerastick(R) units during the period July 1, 2001 through March
          31, 2003, DUSA shall make an additional advance against any payment
          due under this paragraph in the amount of One Hundred Sixty Seven
          Thousand Dollars ($167,000). The final payment of One Hundred Sixty
          Six Thousand Dollars ($166,000) shall be made no later than July 10,
          2003. The parties shall reconcile the number of units manufactured and
          released for shipment by the DUSA Quality Unit and shall adjust the
          total of any payments made under this Sub-Paragraph 2.4.3 (a)(iv) and
          (b) no later than July 10, 2003, to reflect the total number of units
          manufactured and released for shipment during the period July 1, 2001
          to
<PAGE>
Note: Certain portions of this document have been marked "[c.i.]" to indicate
that confidential treatment has been requested for this confidential
information. The confidential portions have been omitted and filed separately
with the Securities and Exchange Commission.

          June 30, 2003.

     (c)  At any time following the date of this Second Amendment, but no later
          than upon termination of the Agreement, NSP shall provide DUSA, at
          DUSA's request, with all current and historical records and
          information, including, without limitation, engineering drawings,
          validation records and protocols, SOPs pertaining to, or supporting
          Kerastick(R) manufacturing, QA processes and procedures, test
          processes and procedures, and all other documents related to the
          cGMP's of manufacturing the Kerastick(R). In addition, NSP will
          provide personnel support who are knowledgeable in connection with the
          manufacture of the Kerastick(R) to DUSA, (subject to reasonable
          availability), at DUSA's cost, at hourly rates as previously charged
          by NSP prior to the date of this Second Amendment. This activity is
          specific to the development of the process and manufacturing
          capability at DUSA and does not relate to providing any of the above
          referenced documentation.

     (d) Further, NSP agrees to provide DUSA a list of consultants and suppliers
         (names, addresses, phone numbers, contacts) associated with the
         original Kerastick(R) project, as well as all suppliers that support
         the manufacturing of the Kerastick(R) for NSP. NSP agrees to release
         these consultants and suppliers to speak directly with DUSA upon
         request for the purposes of technology transfer of the Kerastick(R)
         manufacturing process.

     (e) NSP agrees to maintain the DUSA Kerastick(R) manufacturing facility and
         it's employees in a state of readiness for the manufacture of the
         Kerastick(R) units, and to maintain the capability of producing at
         least 25,000 Kerastick(R) units per month according to established
         procedures and cGMP's.

     (f) Also at termination of the agreement or at any time after the date of
         this Second Amendment, if DUSA notifies NSP that DUSA will not be
         placing any further orders with NSP, NSP shall make DUSA's equipment
         available to DUSA. The actual transportation from NSP's loading dock to
         DUSA's facility would be at DUSA's cost.

     (g)  No later than July 10, 2003 or the end of the Term, whichever is
          sooner, DUSA shall purchase from NSP all the acceptable good and
          marketable inventory of raw materials and components at NSP's invoiced
          cost, and work-in-process relating to the Kerastick(R) at NSP's
          standard cost. DUSA shall also purchase all acceptable inventory of
          finished goods of Kerastick(R) that NSP has available for shipping,
          having a shelf life of at least 22 months.

2.   Further amend Article X Term and Termination as follows:

         Section 10.1 Term. The term of this Agreement shall commence on the
         Effective Date and shall continue in full force and effect until
         December 31, 2002, unless DUSA shall notify NSP in writing on or before
         June 30, 2002 that it wishes to extend the term for an additional six
         (6) months until June 30, 2003. In the event DUSA so notifies NSP, the
         term of the Agreement shall end on June 30, 2003.

3.   In the event that NSP materially breaches the Agreement, all prior
     under-utilization fees paid by DUSA to NSP under this Second Amendment
     shall be refunded in full, and no further under-utilization fees shall be
     due to NSP.

Except as specifically provided in this Second Amendment, all of the provisions
of the Agreement and the Amendment are and shall remain in full force and
effect.

IN WITNESS WHEREOF, the parties have signed this Second Amendment to Purchase
and Supply Agreement effective as of the date stated above.

DUSA Pharmaceuticals, Inc.                       North Safety Products, Inc.

By:    /s/ D. Geoffrey Shulman                   By:     /s/ Moni Levy
       -----------------------                           -----------------------

Date:  07/27/01                                  Date:   07/26/2001
       -----------------------                           -----------------------<PAGE>

                                                                    EXHIBIT 10.5

                             CATASTROPHE AGREEMENT

     This Catastrophe Agreement ("Agreement") dated as of March 1, 1999, is
entered into by and between United States Fire Insurance, a New York domiciled
insurance company, with an office at 305 Madison Avenue, Morristown, New Jersey
07960, on behalf of itself and its affiliated companies ("Client") and Lindsay
Morden Claim Services, Inc., a Texas corporation, with an office at 350 Theodore
Fremd Avenue, Rye, New York 10580 ("Contractor").

     That, for and in consideration of the mutual promises and covenants
hereinafter contained, the parties hereto agree as follows:

I.   DUTIES AND OBLIGATIONS OF CONTRACTOR

     A.   Contractor will provide loss adjusting services for Client's real and
          personal property losses identified by a catastrophe number and which
          are specifically defined in Exhibit A attached hereto and made a part
          hereof, occurring from April 1, 1999, to and including March 31, 2000,
          within the continental United States.

     B.   Contractor shall adjust each reported loss, as specifically defined in
          Exhibit A to conclusion with adjusters that are qualified, experienced
          and appropriately licensed.

     C.   Contractor shall provide supervision for all adjusted losses unless
          Client agrees to provide said supervision directly as described in
          Exhibit A.

     D.   Contractor shall designate an Account Manager to serve as liaison with
          Client at no additional charge to Client.

     E.   Contractor shall procure and maintain for its benefit comprehensive
          general liability coverage and umbrella and/or excess liability
          coverage with minimum total limits of five million dollars
          ($5,000,000) combined single limit for property damage and bodily
          injury. Contractor shall name Client and all parent and affiliated
          companies of Client as additional insureds, as respects this
          particular contract on its comprehensive general liability and
          umbrella and/or excess liability coverage. Contractor shall also
          procure and maintain for its benefit automobile liability coverage in
          an amount of not less than one million dollars ($1,000,000) combined
          single limit.

     F.   Contractor shall procure and maintain a fidelity bond covering
          Contractor, its officers and employees with a limit of not less than
          two million dollars ($2,000,000).

     G.   Contractor shall procure and maintain for itself and its employees all
          insurance coverage required by federal, state or local law, including
          workers' compensation insurance and a minimum of $100,000 in
          employer's liability coverage. All insurance coverages maintained by
          Contractor shall be written by insurers acceptable to the Client.
          Contractor shall furnish to Client Certificates of Insurance
          evidencing all of the above required coverages and naming Client and
          all parent and affiliated companies of Client as additional insureds
          as required. Said certificate(s) will contain a provision whereby
          thirty (30) days notice must be received by Robert Montone, Claims
          Department, United States Fire Insurance Company, 305 Madison Avenue,
          Morristown, New Jersey 07960 prior to cancellation or a material
          change in coverage by either Contractor or insurer.

II.  DUTIES AND OBLIGATIONS OF CLIENT

     A.   Client agrees that all losses subject to this Agreement will be
          reported to Contractor, unless otherwise agreed with Client. Client
          will provide all information relevant to Client's losses to Contractor
          in order for Contractor to fulfill its duties and obligations as set
          out in this Agreement.

     B.   Client agrees to compensate Contractor for Service Fees as outlined in
          Exhibit A (plus any applicable sales taxes or other applicable taxes)
          due and payable to Lindsey Morden, P.O. Box 6030, Tyler, Texas 75711,
          within thirty (30) days of receipt of an adequately documented
          invoice.
<PAGE>

     C.   Client agrees to request dedicated adjusters, if required, within
          seventy-two (72) hours of the specific catastrophe date.

     D.   Client agrees that Contractor will have the right to renegotiate the
          Service Fees in the event of statutory, regulatory or judicial changes
          that require additional activities not contemplated at the inception
          of this Agreement.

III. MUTUAL DUTIES AND OBLIGATIONS

     A.   Indemnification -- Contractor agrees to indemnify and hold harmless
          the Client, its directors, officers, employees and from any and all
          claims arising out of the performance by Contractor of the services
          pursuant to this Agreement. This indemnity and hold harmless shall
          apply to any and all claims against Client from any cause whatsoever,
          even those arising from the negligence of the Client, active or
          passive, excepting only those claims which arise from the sole
          negligence of the Client. This indemnity and hold harmless obligation
          specifically includes the obligation to pay for any and all defense
          costs and attorneys fees.

     B.   Employment Agreement

        1.    The parties agree not to solicit, offer employment or employ, any
              employee of the other party for one (1) year from date of the last
              activity performed under this Agreement without the written
              approval of the other party.

        2.    Contractor, in performance of this Agreement, is acting as an
              independent contractor. Personnel supplied by Contractor hereunder
              are not Client's personnel or agents, and Contractor assumes full
              responsibility for their acts. Contractor shall be solely
              responsible for the payment of compensation of Contractor's
              employees assigned to perform services hereunder, and such
              employees shall be informed that they are not entitled to the
              provision of any Client employee benefits. Client shall not be
              responsible for payment of workers' compensation, disability
              benefits, unemployment insurance and for withholding income taxes
              and social security for any Contractor employee, but such
              responsibility shall be that of Contractor.

     C.   Compliance

        The parties agree that because the nature and magnitude of any given
        catastrophe is an unknown factor, Contractor is nor bound to provide any
        set number of personnel to Client but the number both desired by Client
        and provided by Contractor will be determined upon the occurrence of the
        event and thereafter.

     D.   Cancellation. Either party may cancel this Agreement upon the
          happening of any of the following events.

        1.    Bankruptcy, insolvency or reorganization for the benefit of
              creditors of either party.

        2.    Default in the payment of any indebtedness under this Agreement.

        3.    Failure of either party to remedy a breach of contract and provide
              evidence thereof within thirty (30) days after receipt of written
              notice from the other party.

        This right of cancellation belonging to either party may be exercised
        without prejudice to any other remedy to which it may be entitled at law
        or under this Agreement.

     E.    Arbitration. Any dispute or difference arising with reference to the
           interpretation or effect of this Agreement, or any part thereof,
           shall be referred to a Board of Arbitration (the "Board") of two (2)
           arbitrators and an umpire.

        The members of the Board shall be active or retired disinterested
        officers of insurance or reinsurance companies.
<PAGE>

        One arbitrator shall be chosen by the party initiating the arbitration
        and designated in the letter requesting arbitration. The other party
        shall respond, within thirty (30) days, advising of its arbitrator. The
        umpire shall thereafter be chosen by the two (2) arbitrators. In the
        event either party fails to designate its arbitrator as indicated above,
        the other party is hereby authorized and empowered to name the second
        arbitrator, and the party which failed to designate its arbitrator shall
        be deemed to have waived its rights to designate an arbitrator and shall
        not be aggrieved thereby. The two (2) arbitrators shall then have thirty
        (30) days within which to choose an umpire. If they are unable to do so
        within thirty (30) days following their appointment, the umpire shall be
        chosen by the manager of the American Arbitration Association and such
        umpire shall be a person who is an active or retired or disinterested
        officer of an insurance or reinsurance company. In the event of the
        death, disability or incapacity of an arbitrator or the umpire, a
        replacement shall be named pursuant to the process which resulted in the
        selection of the arbitrator or umpire to be replaced.

        Each party shall submit its case to the Board within one (I) month from
        the date of the appointment of the umpire, but this period of time may
        be extended by unanimous written consent of the Board.

        The Board shall make its decision with regard to the custom and usage of
        the insurance and reinsurance business. The Board is released from all
        judicial formalities and may abstain from the strict rules of law. The
        written decision of a majority of the Board shall be rendered within
        sixty (60) days following the termination of the Board's hearings,
        unless the parties consent to an extension. Such majority decision of
        the Board shall be final and binding upon the parties both as to law and
        fact, and may not be appealed to any court of any jurisdiction. Judgment
        may be entered upon the final decision of the Board in any court of
        proper jurisdiction.

        Each party shall bear the fees and expenses of the arbitrator selected
        by or on its behalf, and the parties shall bear the fees and expenses of
        the umpire as determined by the party, as above provided, the expenses
        of the arbitrators, the umpire and the arbitration shall be equally
        divided between the two parties. The arbitrators may allocate any and
        all of the costs and fees against the losing party upon a determination
        that the position of the losing party was, in whole or in part,
        groundless, specious or otherwise without merit or asserted primarily
        for the purposes of obfuscation or delay.

     F.    Governing Law. This Agreement shall be governed by the laws of the
           State of Texas.

     G.   Amendment. This Agreement may be modified or amended only in writing
          arid signed by both parties to this Agreement.

     H.   Severability. Should any provision of this Agreement be declared or
          determined by any court of competent jurisdiction to be illegal or
          invalid, the validity of the remaining parts, terms or provisions
          shall not be affected thereby and said illegal part, term or provision
          shall be deemed not a part of this Agreement.

     I.    Entire Agreement. This Agreement, together with the exhibits attached
           hereto, constitutes the entire Agreement between the parties with
           respect to the subject matter hereof and any other written or oral
           prior agreements, contracts, proposals, representations, statements,
           negotiations, understandings, or assurances are superseded hereby.
<PAGE>

     IN WITNESS WHEREOF, Client and Contractor have caused this Agreement to be
executed by persons authorized to act in their respective names.

<Table>
<S>  <C>                                            <C>  <C>
UNITED STATES FIRE INSURANCE COMPANY
     LINDSEY MORDEN CLAIM SERVICES, INC.

By:  /s/ PAUL KUSH                                  By:  /s/ BEN MARTIN
     ----------------------------------------            ----------------------------------------
     Its Vice President                                  Its Vice President

By:  /s/ VALERIE J. GASPARIK                        By:  /s/ R. MONTONE
     ----------------------------------------            ----------------------------------------
     Its Secretary                                       Witness
</Table>
<PAGE>

                                                                       EXHIBIT A

                      LINDSEY MORDEN CLAIM SERVICES, INC.

                                 LINDSEY MORDEN

                  FULL ADJUSTMENT CATASTROPHE PROGRAM SCHEDULE

PREPARED FOR CRUM & FORSTER INSURANCE COMPANY FOR THE PERIOD COVERING JANUARY 1,
1999 TO DECEMBER 31, 2000.

FEES

<Table>
<Caption>
                                                              WINDSTORM/
FULL COST OF REPAIR                                           HAILSTORM     HURRICANE
-------------------                                           ----------    ---------
<S>                                                           <C>           <C>
Erroneous Assignment Denials................................   $ 40.00       $ 40.00
                                                                   T&E           T&E
$.00 -- $500.00.............................................   $115.00       $125.00
$500.01 -- $1,000.00........................................   $130.00       $145.00
$1,000.01 -- $1,500.00......................................   $145.00       $165.00
$1,500.01 -- $2,500.00......................................   $175.00       $205.00
$2,500.01 -- $3,500.00......................................   $230.00       $245.00
$3,500.01 -- $5,000.00......................................   $275.00       $300.00
$5,000.01 -- $7,500.00......................................   $365.00       $380.00
$7,500.01 -- $10,000.00.....................................   $460.00       $485.00
$10,000.01 -- $15,000.00....................................   $525.00       $595.00
$15,000.01 -- $25,000.00....................................   $675.00       $695.00
$25,000.01 -- $50,000.00....................................   $850.00       $970.00
$50,000.01 and above........................................       T&E           T&E
</Table>

     Time element, earthquake, specialty lines (including environmental) losses,
and complicated adjustments, including losses handled by a public adjuster, will
be adjusted at Contractor's prevailing time and expense rates in effect at time
of file activity.

  A Member of the Cunningham Lindsey International Network -- Linking You to a
                               World of Resources
 website: www.lindseyrnorden.com           email: lindseymorden@lm.adjust4.com
<PAGE>

                      LINDSEY MORDEN CLAIM SERVICES, INC.

FULL ADJUSTMENT CATASTROPHE INCLUDES

     -  24 Hour Contact with the Insured

     -  48 to 72 Hour Inspection of Property

     -  Reserve Recommendation to Client in 5 Business Days

     -  Full Cost of Repair or Replacement of Damage

     -  Cause of Loss Confirmation

     -  Estimated Replacement Cost and Actual Cash Value of Risk

     -  Agreed Claim, involving applicable Depreciation, Coinsurance, Limiting
        Clauses, and Deductible

     -  Diagram if Applicable

     -  Suggested Salvage Potential

     -  Suggested Subrogation Potential

     -  Four (4) Color Photographs

     -  Loss in excess of $50,000 -- Contact Client Immediately

     -  Limit Photos to Covered Loss

     -  First Report in 10 Days

     -  Every Report thereafter in 30 Days

     -  Reporting on Lindsey Morden Form 200-0032

     -  Property Proof of Loss on losses at or above $50,000

FLAT FEES INCLUDE:

     -  Driving time and mileage expenses over the first 50 miles driven and
        included will be billed at current rates in accordance to additional
        miles driven

     -  Photographs -- $2.00 each for additional over included

     -  Long distance telephone expenses and fax at $1.00 per sheet

     -  Bride, toll road and parking expenses

     -  State and Federal Taxes

     -  Express mail or delivery

     -  Public records and outside expert fees

     -  Any other extraordinary out of pocket expense will be billed on an
        actual cost basis

  A Member of the Cunningham Lindsey International Network -- Linking You to a
                               World of Resources
  website: www.findseymorden.com           email: lindseymorden@lm.adjust4.com

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