Document:

EXHIBIT 10.1

                                AMENDMENT TO THE
                          EMPLOYMENT AGREEMENT BETWEEN
                    BARRETT A. TOAN AND EXPRESS SCRIPTS, INC.

     This  Amendment  (the   "Amendment")  to  the  Employment   Agreement  (the
"Agreement"),  effective  April 1,  1999,  between  Barrett  A. Toan  ("You" and
"Your") and Express  Scripts,  Inc. (the "Company") will become effective on and
only on the date on which the  Company no longer has any  outstanding  shares of
Class B common stock (the "Effective Date").

     1. The first paragraph of Paragraph 1 of the Agreement is hereby amended in
its entirety to read as follows:

         (1) Employment  and  Assignment;  Diligent and Faithful  Performance of
         Duties.  Subject to the provisions hereof, the Company agrees to employ
         You as President  and Chief  Executive  Officer  through the end of the
         Term (as  defined  in  paragraph  3,  below)  and during the Term shall
         include  You in any slate of  nominees  of  individuals  nominated  for
         election to serve as directors on the Company's Board of Directors (the
         "Board") and shall take all necessary  actions and use reasonable  best
         efforts,  to the extent permitted by law, to cause Your election to the
         Board by the shareholders of the Company and shall use the same efforts
         to recommend to the Board that You be nominated and elected as Chairman
         of the  Board;  provided  that,  at any time on or after  April 1, 2004
         until the end of the Term,  You shall be entitled to elect to resign as
         President   and  Chief   Executive   Officer   of  the   Company   (the
         "Resignation")  and to  continue  solely as Chairman of the Board until
         March 31, 2005. In  consideration  of  employment  by the Company,  You
         agree  to  discharge  faithfully,  diligently  and to the  best of Your
         ability,  the  responsibilities  of the  positions You hold during Your
         employment.

     2.  Paragraph 2 of the Agreement is hereby  amended in its entirety to read
as follows:

         (2) Term of Agreement. Unless terminated earlier in accordance with the
         Agreement,  the term of the  Agreement  commenced  on April 1, 1999 and
         will continue  through March 31, 2005 on which date the Agreement  will
         terminate and, except as otherwise  provided  herein,  be of no further
         force or effect (the "Term").

     3. Paragraph 3(C) of the Agreement is amended as follows:

          A. Paragraph 3(C)(ii) is amended by renumbering the current section to
     be (ii)(a)  and adding a new  section  (b) to read as  follows:  Additional
     Grants.  As of the  Effective  Date,  you will  receive an award  under the
     Express Scripts,  Inc. 2000 Long-Term Incentive Plan (the "Incentive Plan")
     of (i) fifty thousand (50,000) shares of the Company's Class A common stock
     (the  "Restricted  Shares")  and (ii) an option (the  "Option") to purchase
     ninety thousand (90,000) shares of the Company's Class A common stock at an
     exercise  price for such options  equal to the fair market value of a share
     on the Effective Date (collectively,  the "2000 Equity Grant").  Subject to
     subparagraphs  (iii) and (iv),  below,  the 2000 Equity  Grant Option shall
     vest, as follows:  1/3 on March 31, 2003,  1/3 on March 31, 2004 and 1/3 on
     March 31, 2005 and the 2000 Equity Grant Restricted Shares shall fully vest
     on March 31,  2005;  provided  that you are still  employed  by the Company
     (including any service solely as Chairman of the Board) on such dates.

          B. Paragraph  3(C)(vi)(a) is amended by changing "fifty percent (50%)"
     to "twenty  percent (20%)" and deleting  "(provided  that " through "twenty
     percent (20%))".

          C.  Paragraph  3(C)(vi)(d)  is  amended by  changing  "less than fifty
     percent (50%)" to "less than eighty  percent (80%)" and deleting  "provided
     that" where it first appears in the parenthetical  through "shall be eighty
     percent (80%);".

          D.  Paragraph  3(C)(vi)  is further  amended  by adding the  following
     paragraph at the end thereof:

     Notwithstanding  any  provision in this  Agreement to contrary,  solely for
purposes  of the 2000  Equity  Grant  and the 2000  Deferred  Compensation,  the
current offering  described in the  Registration  Statement on Form S-3 filed on
Friday, October 6, 2000 under the Securities Act of 1933 with the Securities and
Exchange Commission and the contemplated  reorganization transaction pursuant to
Section  368(a)(1)(C)  of the  Internal  Revenue  Code of 1986,  as amended,  to
effectuate  the  exchange of Class B shares of the  Company's  common  stock for
shares of Class A Common Stock (collectively,  the "2000 Transaction") shall not
constitute a Change of Control under subparagraph (a), above; provided,  that if
any  "person"  or "group"  that  acquires  twenty  percent  (20%) or more of the
outstanding securities of the Company in the 2000 Transaction shall subsequently
acquire  additional  securities of the Company in a single transaction or series
of transactions  such that total ownership of such "person" or "group" equals or
exceeds thirty-three percent (33%), such additional acquisition shall constitute
a Change of Control hereunder. Except as provided in the preceding sentence with
respect to  subparagraph  (a),  above,  the 2000  Transaction and any subsequent
transactions  or events may, if  applicable,  be  considered a Change of Control
under subparagraphs (b),(c) or (d), above.

     4.  Paragraphs  3(C)(iii)  and (iv) of the Agreement are amended to read as
follows:  (iii)  Vesting.  Notwithstanding  any provision to the contrary in the
Option Plan or Incentive Plan, any options granted to you under the Option Plan,
Incentive Plan or otherwise  (including  but not limited to the grants  provided
for under this  Agreement and any and all options  granted prior to or after the
date  hereof)  and  any and all of your  Restricted  Shares  (including  but not
limited  to the  grant  provided  for  under  this  Agreement  and  any  and all
Restricted  Shares  obtained prior to or after the date hereof) shall fully vest
not later than upon a Change of Control (as that term is defined in subparagraph
vi of this paragraph  3(C));  Your  termination by the Company without Cause (as
defined in  subparagraph  A of paragraph 7);  termination by You for Good Reason
(as defined in  subparagraph  C of paragraph 7); March 31, 2005 if you are still
employed by the Company (including any service solely as Chairman of the Board);
Your death or Disability (as defined in subparagraph E of paragraph 7).

     (iv) Equity Upon Termination.

          (A) If Your  employment  is  terminated by the Company for Cause or by
     You without Good Reason,  You shall  forfeit any options that have not been
     exercised within thirty (30) days after such  termination.  Notwithstanding
     any provision to the contrary in this Agreement, the Option Plan, Incentive
     Plan or any other plan, if the Company  terminates You without  Cause,  You
     terminate   employment  for  Good  Reason,  You  die,  Your  employment  is
     terminated by the Company because of a Disability, in the event of a Change
     of Control, all of Your options shall become fully exercisable  immediately
     upon such event and shall remain  exercisable  until the expiration date of
     the option  (determined  without regard to Your  termination of employment)
     and all restricted shares  previously  acquired by you shall vest upon such
     event.

          (B)  If  You  terminate  employment  for  any  reason  (other  than  a
     Termination  for Cause as defined in  paragraph  7), on or after  March 31,
     2005, any options  granted to You under the Option Plan,  Incentive Plan or
     otherwise  (including  but not  limited  to grants of  options  under  this
     Agreement and any and all obtained prior to or after the date hereof) shall
     to  the  extent  exercisable  on  the  date  of  such  termination,  remain
     exercisable  until the expiration  date of the Option  (determined  without
     regard to Your termination of employment).

     5. A new Section 3(F) is hereby added, to read as follows:

                  F. Deferred Compensation.  The Company hereby agrees to credit
         three million five hundred thousand dollars ($3,500,000) (the "deferred
         amount")  to your  Retirement  Account (as  Deferred  Compensation)(the
         "2000 Deferred Compensation") under the Express Scripts, Inc. Executive
         Deferred  Compensation  Plan  (the  "Deferred  Compensation  Plan"  and
         Retirement Account and Deferred Compensation shall be as defined in the
         Deferred  Compensation  Plan) as of the date this Amendment is executed
         and that  such  date  shall  be the  Credit  Date  under  the  Deferred
         Compensation  Plan.  Notwithstanding  anything  to the  contrary in the
         Deferred  Compensation  Plan or the  Agreement,  You shall  forfeit the
         deferred  amount (and any income,  earnings or other gains  thereon) if
         and only if Your  employment  with the Company  (including  any service
         solely as the Chairman of the Board) terminates prior to March 31, 2005
         for any reason other than Your termination by the Company without Cause
         (as defined in  subparagraph A of paragraph 7), Your death,  Disability
         (as defined in  subparagraph E of paragraph 7),  Retirement (as defined
         in the  Deferred  Compensation  Plan),  or Good  Reason (as  defined in
         subparagraph  C of paragraph 7).  Except as otherwise  provided in this
         Amendment,  the  deferred  amount  shall be  subject  to the  terms and
         conditions of the Deferred Compensation Plan.

     6. Section 7(C)(ii) is hereby amended as follows:

          A. Section 7(C)(ii)(a) is hereby amended to read as follows:

               (a)   assignment   of  any  duties   materially   and   adversely
          inconsistent with Your position as specified herein, including status,
          offices, or responsibilities as contemplated under paragraph 1 of this
          Agreement  (provided that it is expressly agreed that Your Resignation
          shall not constitute "Good Reason") or any other action by the Company
          which  results  in a material  and  adverse  change in such  position,
          status,  offices,  titles or  responsibilities,  or any  material  and
          adverse  change in Your  reporting  responsibilities  (not due to Your
          Resignation).

               B. Paragraph 7(C)(ii) is amended by deleting the word "or" at the
          end of Paragraph 7(C)(ii)(d), changing the "." at the end of Paragraph
          7(C)(ii)(e) to a "," and adding the following new  subparagraph (f) to
          Paragraph 7(C)(ii):

                    (f)  any  failure  at any  time  during  the  Term  of  this
               Agreement of Your being  elected and continued to be reelected as
               Chairman of the Board.

              C. The following  paragraph is added at the end of Paragraph
          7(C)(ii):

                  The  Company's  appointment  of a new President to succeed You
                  with Your consent  (which  consent  shall not be  unreasonably
                  withheld) shall not constitute "Good Reason".

Date:  October 17, 2000

                               EXPRESS SCRIPTS, INC.

                               By:  /s/ Seymour Sternberg
                                   -------------------------------
                                    Name: Seymour Sternberg
                                       Title: Chairman of the Executive
                                               Committee and Member of
                                                the Compensation Committee

                               /s/ Barrett A. Toan
                               --------------------------------------------
                               BARRETT A. TOANTHIS NOTE AND THE COMMON SHARES ISSUABLE UPON CONVERSION OF THIS NOTE HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED. THIS NOTE AND THE
COMMON SHARES ISSUABLE UPON CONVERSION OF THIS NOTE MAY NOT BE SOLD, OFFERED FOR
SALE, PLEDGED OR HYPOTHECATED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION
STATEMENT AS TO THIS NOTE UNDER SAID ACT OR AN OPINION OF COUNSEL REASONABLY
SATISFACTORY TO TECH LABORATORIES, INC. THAT SUCH REGISTRATION IS NOT REQUIRED.

                                CONVERTIBLE NOTE

     FOR VALUE RECEIVED, TECH LABORATORIES, INC., a New Jersey corporation
(hereinafter called "Borrower"), hereby promises to pay to
__________________________, _______________________________________, Fax No.:
_________________ (the "Holder") or order, without demand, the sum of
$_____________, with simple interest accruing at the annual rate of 6.5%, on
October 13, 2002 (the "Maturity Date").

     The following terms shall apply to this Note:

                                    ARTICLE I

                           DEFAULT RELATED PROVISIONS

     1.1 Payment Grace Period. The Borrower shall have a ten (10) day grace
period to pay any monetary amounts due under this Note, after which grace period
a default interest rate of 18% per annum shall apply to the amounts owed
hereunder.

     1.2 Conversion Privileges. The Conversion Privileges set forth in Article
II shall remain in full force and effect immediately from the date hereof and
until the Note is paid in full.

     1.3 Interest Rate. Subject to the Holder's right to convert, interest
payable on this Note shall accrue at the annual rate of 6.5% and be payable
quarterly commencing January 1, 2001, and on the Maturity Date, accelerated or
otherwise, when the principal and remaining accrued but unpaid interest shall be
due and payable, or sooner as described below.

                                   ARTICLE II

                                CONVERSION RIGHTS

     The Holder shall have the right to convert the principal amount and
interest due under this Note into Shares of the Borrower's Common Stock as set
forth below.

     2.1. Conversion into the Borrower's Common Stock.

     (a) The Holder shall have the right from and after the issuance of this
Note and then at any time until this Note is fully paid, to convert any
outstanding and unpaid principal portion of this Note, and/or at the Holder's
election, the interest accrued on the Note, (the date of giving of such notice
of conversion being a "Conversion Date") into fully paid and nonassessable
shares of common stock of Borrower as such stock exists on the date of issuance
of this Note, or any shares of capital stock of Borrower into which such stock
shall hereafter be changed or reclassified (the "Common Stock") at the
conversion price as defined in Section 2.1(b) hereof (the "Conversion Price"),
determined as provided herein. Upon delivery to the Company of a Notice of
Conversion as described in Section 9 of the subscription agreement entered into
between the Company and Holder relating to this Note (the "Subscription
Agreement") of the Holder's written request for conversion, Borrower shall issue
and deliver to the Holder within six business days from the Conversion Date that
number of shares of Common Stock for the portion of the Note converted in
accordance with the foregoing. At the election of the Holder, the Company will
deliver accrued but unpaid interest on the Note through the Conversion Date
directly to the Holder on or before the Delivery Date (as defined in the
Subscription Agreement). The number of shares of Common Stock to be issued upon
each conversion of this Note shall be determined by dividing that portion of the
principal (and interest, at the election of the Holder) of the Note to be
converted, by the Conversion Price.

<PAGE>

     (b) Subject to adjustment as provided in Section 2.1(c) hereof, the
Conversion Price per share shall be the lower of (i) eighty-five (85%) of the
average of the five lowest closing bid prices reported by Bloomberg, L.P. for
the Common Stock on the NASD OTC Bulletin Board, NASDAQ SmallCap Market, NASDAQ
National Market System, American Stock Exchange, or New York Stock Exchange
(whichever of the foregoing is at the time the principal trading exchange or
market for the Common Stock, the "Principal Market"), or if not then trading on
a Principal Market, such other principal market or exchange where the Common
Stock is listed or traded for the twenty-two (22) trading days prior to but not
including the issue date of this Note ("Maximum Base Price"); or (ii)
eighty-five percent (85%) percent of the average of the five lowest closing bid
prices for the Common Stock on the Principal Market, or on any securities
exchange or other securities market on which the Common Stock is then being
listed or traded, for the twenty-two (22) trading days prior to but not
including the Conversion Date.

     (c) The Maximum Base Price described in Section 2.1(b)(i) above and number
and kind of shares or other securities to be issued upon conversion determined
pursuant to Section 2.1(a) and 2.1(b), shall be subject to adjustment from time
to time upon the happening of certain events while this conversion right remains
outstanding, as follows:

     A. Merger, Sale of Assets, etc. If the Borrower at any time shall
consolidate with or merge into or sell or convey all or substantially all its
assets to any other corporation, this Note, as to the unpaid principal portion
thereof and accrued interest thereon, shall thereafter be deemed to evidence the
right to purchase such number and kind of shares or other securities and
property as would have been issuable or distributable on account of such
consolidation, merger, sale or conveyance, upon or with respect to the
securities subject to the conversion or purchase right immediately prior to such
consolidation, merger, sale or conveyance. The foregoing provision shall
similarly apply to successive transactions of a similar nature by any such
successor or purchaser. Without limiting the generality of the foregoing, the
anti-dilution provisions of this Section shall apply to such securities of such
successor or purchaser after any such consolidation, merger, sale or conveyance.

     B. Reclassification, etc. If the Borrower at any time shall, by
reclassification or otherwise, change the Common Stock into the same or a
different number of securities of any class or classes, this Note, as to the
unpaid principal portion thereof and accrued interest thereon, shall thereafter
be deemed to evidence the right to purchase such number and kind of securities
as would have been issuable as the result of such change with respect to the
Common Stock immediately prior to such reclassification or other change.

     C. Stock Splits, Combinations and Dividends. If the shares of Common Stock
are subdivided or combined into a greater or smaller number of shares of Common
Stock, or if a dividend is paid on the Common Stock in shares of Common Stock,
the Conversion Price shall be proportionately reduced in case of subdivision of
shares or stock dividend or proportionately increased in the case of combination
of shares, in each such case by the ratio which the total number of shares of
Common Stock outstanding immediately after such event bears to the total number
of shares of Common Stock outstanding immediately prior to such event.

     D. Share Issuance. Subject to the provisions of this Section, if the
Borrower at any time shall issue any shares of Common Stock prior to the
conversion of the entire principal amount of the Note (otherwise than as: (i)
provided in Sections 2.1(c)A, 2.1(c)B or 2.1(c)C or this subparagraph D); (ii)
pursuant to options, warrants, or other obligations to issue shares, outstanding
on the date hereof as described in the Reports and Other Written Information, as
such terms are defined in the Subscription Agreement (which agreement is
incorporated herein by this reference); or (iii) Excepted Issuances, as defined
in Section 12(a) of the Subscription Agreement; [(i), (ii) and (iii) above, are
hereinafter referred to as the "Existing Option Obligations"] for a
consideration less than the Conversion Price that would be in effect at the time
of such issue, then, and thereafter successively upon each such issue, the
Conversion Price shall be reduced as follows: (i) the number of shares of Common
Stock outstanding immediately prior to such issue shall be multiplied by the
Conversion Price in effect at the time of such issue and the product shall be
added to the aggregate consideration, if any, received by the Borrower upon such
issue of additional shares of Common Stock; and (ii) the sum so obtained shall
be divided by the number of shares of Common Stock outstanding immediately after
such issue. The resulting quotient shall be the adjusted conversion price.
Except for the Existing Option Obligations, for purposes of this adjustment, the
issuance of any security of the Borrower carrying the right to convert

<PAGE>

such security into shares of Common Stock or of any warrant, right or option to
purchase Common Stock shall result in an adjustment to the Conversion Price upon
the issuance of shares of Common Stock upon exercise of such conversion or
purchase rights.

     (d) During the period the conversion right exists, Borrower will reserve
from its authorized and unissued Common Stock a sufficient number of shares to
provide for the issuance of Common Stock upon the full conversion of this Note.
Borrower represents that upon issuance, such shares will be duly and validly
issued, fully paid and non-assessable. Borrower agrees that its issuance of this
Note shall constitute full authority to its officers, agents, and transfer
agents who are charged with the duty of executing and issuing stock certificates
to execute and issue the necessary certificates for shares of Common Stock upon
the conversion of this Note.

     2.2 Method of Conversion. This Note may be converted by the Holder in whole
or in part as described in Section 2.1(a) hereof and the Subscription Agreement.
Upon partial conversion of this Note, a new Note containing the same date and
provisions of this Note shall be issued by the Borrower to the Holder for the
principal balance of this Note and interest which shall not have been converted
or paid.

                                   ARTICLE III

                                EVENT OF DEFAULT

     The occurrence of any of the following events of default ("Event of
Default") shall, at the option of the Holder hereof, make all sums of principal
and interest then remaining unpaid hereon and all other amounts payable
hereunder immediately due and payable, all without demand, presentment or
notice, or grace period, all of which hereby are expressly waived, except as set
forth below:

     3.1 Failure to Pay Principal or Interest. The Borrower fails to pay any
installment of principal or interest hereon when due and such failure continues
for a period of ten (10) days after the due date.

     3.2 Breach of Covenant. The Borrower breaches any material covenant or
other term or condition of this Note in any material respect and such breach, if
subject to cure, continues for a period of seven (7) days after written notice
to the Borrower from the Holder.

     3.3 Breach of Representations and Warranties. Any material representation
or warranty of the Borrower made herein, in the Subscription Agreement entered
into by the Holder and Borrower in connection with this Note, or in any
agreement, statement or certificate given in writing pursuant hereto or in
connection therewith shall be false or misleading in any material respect.

     3.4 Receiver or Trustee. The Borrower shall make an assignment for the
benefit of creditors, or apply for or consent to the appointment of a receiver
or trustee for it or for a substantial part of its property or business; or such
a receiver or trustee shall otherwise be appointed.

     3.5 Judgments. Any money judgment, writ or similar final process shall be
entered or filed against Borrower or any of its property or other assets for
more than $50,000, and shall remain unvacated, unbonded or unstayed for a period
of forty-five (45) days.

     3.6 Bankruptcy. Bankruptcy, insolvency, reorganization or liquidation
proceedings or other proceedings or relief under any bankruptcy law or any law
for the relief of debtors shall be instituted by or against the Borrower and if
instituted against Borrower are not dismissed within 45 days of initiation.

     3.7 Delisting. Delisting of the Common Stock from the Principal Market or
such other principal exchange on which the Common Stock is listed for trading;
Borrower's failure to comply with the conditions for listing; or notification
that the Borrower is not in compliance with the conditions for such continued
listing.

     3.8 Concession. A concession by the Borrower, after applicable notice and
cure periods, under any one or more obligations in an aggregate monetary amount
in excess of $50,000 over a period of not more than 3 months.

<PAGE>

     3.9 Stop Trade. An SEC stop trade order or Principal Market trading
suspension.

     3.10 Failure to Deliver Common Stock or Replacement Note. Borrower's
failure to timely deliver Common Stock to the Holder pursuant to and in the form
required by this Note and Section 9 of the Subscription Agreement, or Balance
Note (as defined in the Subscription Agreement).

     3.11 Registration Default. The occurrence of a Non-Registration Event as
described in Section 10.4 of the Subscription Agreement.

                                   ARTICLE IV

                                  MISCELLANEOUS

     4.1 Failure or Indulgence Not Waiver. No failure or delay on the part of
Holder hereof in the exercise of any power, right or privilege hereunder shall
operate as a waiver thereof, nor shall any single or partial exercise of any
such power, right or privilege preclude other or further exercise thereof or of
any other right, power or privilege. All rights and remedies existing hereunder
are cumulative to, and not exclusive of, any rights or remedies otherwise
available.

     4.2 Notices. Any notice herein required or permitted to be given shall be
in writing and may be personally served or sent by fax transmission (with copy
sent by regular, certified or registered mail or by overnight courier). For the
purposes hereof, the address and fax number of the Holder is as set forth on the
first page hereof. The address and fax number of the Borrower shall be Tech
Laboratories, Inc., 955 Belmont Avenue, North Haledon, NJ 07508, telecopier
number: (973) 427-5455. Both Holder and Borrower may change the address and fax
number for service by service of notice to the other as herein provided. Notice
of Conversion shall be deemed given when made to the Company pursuant to the
Subscription Agreement.

     4.3 Amendment Provision. The term "Note" and all reference thereto, as used
throughout this instrument, shall mean this instrument as originally executed,
or if later amended or supplemented, then as so amended or supplemented.

     4.4 Assignability. This Note shall be binding upon the Borrower and its
successors and assigns, and shall inure to the benefit of the Holder and its
successors and assigns, and may be assigned by the Holder.

     4.5 Cost of Collection. If default is made in the payment of this Note,
Borrower shall pay the Holder hereof reasonable costs of collection, including
reasonable attorneys' fees.

     4.6 Governing Law. This Note shall be governed by and construed in
accordance with the laws of the State of New York. Any action brought by either
party against the other concerning the transactions contemplated by this
Agreement shall be brought only in the state courts of New York or in the
federal courts located in the state of New York. Both parties and the individual
signing this Agreement on behalf of the Borrower agree to submit to the
jurisdiction of such courts. The prevailing party shall be entitled to recover
from the other party its reasonable attorney's fees and costs.

     4.7 Maximum Payments. Nothing contained herein shall be deemed to establish
or require the payment of a rate of interest or other charges in excess of the
maximum permitted by applicable law. In the event that the rate of interest
required to be paid or other charges hereunder exceed the maximum permitted by
such law, any payments in excess of such maximum shall be credited against
amounts owed by the Borrower to the Holder and thus refunded to the Borrower.

     4.8 Prepayment. This Note may not be paid prior to the Maturity Date
without the consent of the Holder.

     IN WITNESS WHEREOF, Borrower has caused this Note to be signed in its name
by its Chief Executive Officer on this _____ day of October, 2000.

<PAGE>

                                          TECH LABORATORIES, INC.

                                          By:________________________________

WITNESS:

-------------------------------

                              NOTICE OF CONVERSION

(To be executed by the Registered Holder in order to convert the Note)

     The undersigned hereby elects to convert $_________ of the principal and
$_________ of the interest due on the Note issued by TECH LABORATORIES, INC. on
October ____, 2000 into Shares of Common Stock of TECH LABORATORIES, INC. (the
"Company") according to the conditions set forth in such Note, as of the date
written below.

Date of Conversion:_____________________________________________________________

Conversion Price:_______________________________________________________________

Shares To Be Delivered:_________________________________________________________

Signature:______________________________________________________________________

Print Name:_____________________________________________________________________

Address:________________________________________________________________________

        ________________________________________________________________________

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