<PAGE>

AGENCY AGREEMENT                                               FEBRUARY 15, 2003
ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.
               &
ENERTECK CHEMICAL COMPANY, INC.


                                AGENCY AGREEMENT

                                     BETWEEN

                 ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.

                                       AND

                            ENERTECK CHEMICAL COMPANY

This Agreement ("Agreement") is entered into as of February 15, 2003 (the
"Effective Date") by and between ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.,
its divisions, its affiliate companies and concerns, a corporation organized
under the laws of Brazil (hereinafter referred to as " AGENT") and the ENERTECK
CHEMICAL COMPANY, INC., a corporation organized under the laws of the state of
Texas in the United States of America (hereinafter referred to as EnerTeck).

1.       REPRESENTATION

         (a)      EnerTeck hereby appoints AGENT as its sole agent for the
                  Territory (countries) listed in Appendix "A" hereto
                  ("Territory") for the sale of EnerTeck's products and services
                  as listed in Appendix "B" hereto.

         (b)      AGENT shall not, without the consent of EnerTeck sell, rent or
                  distribute, directly or indirectly, any EnerTeck products or
                  services in any country or other location outside the
                  Territory.

         (c)      AGENT hereby accepts its appointment on the terms and
                  conditions herein set forth.

2.       DUTIES OF AGENT

         In consideration of the above appointment and the commission to be paid
         by EnerTeck to the AGENT hereunder the:

         (a)      AGENT shall establish and maintain a sales program for the
                  sale of the EnerTeck products and services covered by this
                  Agreement and shall maintain facilities and personnel as are
                  reasonably adequate to perform its obligations under this
                  Agreement.

         (b)      AGENT shall promptly transmit to EnerTeck inquiries and orders
                  for EnerTeck products and services in the Territory of the
                  AGENT. Agent shall coordinate negotiations and communication
                  on behalf of EnerTeck for all prospective sales on EnerTeck's
                  products and services within the Territory.

         (c)      AGENT shall make no warranties, representations or
                  certifications with respect to the EnerTeck products and
                  services without the prior consent of EnerTeck. AGENT shall


<PAGE>

AGENCY AGREEMENT                                               FEBRUARY 15, 2003
ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.
               &
ENERTECK CHEMICAL COMPANY, INC.


                  hold EnerTeck free and harmless from any claims, lawsuit,
                  damages and cost and expenses caused by it having made any
                  such unauthorized warranties and representations.

         (d)      AGENT, at its sole expense, shall comply with all the laws,
                  regulations and rules applicable to its operations and to its
                  performance of this Agreement. AGENT shall hold EnerTeck free
                  and harmless from any claims, damages, lawsuits, penalties and
                  costs and expenses caused by AGENT's failure to comply with
                  any such laws, regulations and rules.

         (e)      AGENT shall not, directly or indirectly, infringe or contest
                  the validity of or the title of EchemTrade to any of the
                  patents, trademarks and trade names owned by EnerTeck or under
                  which EnerTeck is licensed. The termination of this Agreement
                  for any reason shall in no way release or discharge AGENT from
                  the estoppel herein set forth.

         (f)      Agent shall, at the request of EnerTeck, assist in expediting
                  and obtaining import and export permits and licenses, required
                  customs clearance and delivery of shipments to EnerTeck's
                  customers. All costs and charges shall be pre-approved and
                  Enerteck agrees to reimburse AGENT the actual costs and
                  expenses, plus a service charge of five (5) percent of the
                  actual costs and expenses, incurred by AGENT on behalf of
                  EnerTeck in performing these services. Proper documentation
                  should be presented to EnerTeck no later than 90 days from the
                  date that said expenses were incurred.

         (g)      AGENT will not sell, rent or distribute, indirectly or
                  directly, any of the EnerTeck products and services for use or
                  sale in any area in or to which EnerTeck itself would be
                  prohibited by applicable law, regulations or order of the
                  United States of America, or any of the governmental agencies
                  thereof, from selling, distributing renting or otherwise
                  permitting the use of said products and services.

         (h)      AGENT shall reasonably assist EnerTeck in tracking and
                  expediting payment of outstanding invoices and receivables as
                  required, advise and assist EnerTeck in the establishment of
                  relationships between EnerTeck and banking institutions and
                  professional advisors in the country of sale, and provide
                  other services similar to those hereinabove described which
                  are appropriate and necessary in connection with EnerTeck's
                  business activities in the country.

         (i)      AGENT shall perform its services with that standard of care,
                  skill and diligence normally provided by an agent in the
                  performance of similar services. Agent understands that
                  EnerTeck will be relying upon the accuracy, competence and
                  completeness of Agent's services in initially deciding whether
                  to seek to obtain a contract with respect to a qualifying
                  project or customer.

3.       AUTHORITY / LIMITATIONS

         Services performed or actions taken on behalf of EnerTeck by Agent
         shall only be as specifically requested and authorized by EnerTeck.
         Agent understands and agrees that it is an independent contractor and
         not an employee of EnerTeck, and that this Agreement does not establish
         a


<PAGE>

AGENCY AGREEMENT                                               FEBRUARY 15, 2003
ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.
               &
ENERTECK CHEMICAL COMPANY, INC.


         partnership between the parties, and that agent has no authority to act
         on EnerTeck's behalf or bind EnerTeck in any way except as EnerTeck may
         expressly direct and confirm in writing.

         AGENT shall have no authority to accept direct payments from customers
         without the express written consent of EnerTeck.

4.       CONFIDENTIALITY

         Both parties shall maintain as confidential all information relating to
         their respective products, personnel, customers, business operations,
         financial condition, supplied by either party separately and/or
         developed jointly by the parties. Both parties further agree to
         safeguard as confidential all price books, customers' lists,
         quotations, discount schedules, product formulations and engineering
         data, in any form, and will not permit their use in any way which would
         be detrimental to either party. Both parties also agree to surrender
         all confidential data to other party on cancellation or termination of
         this agreement, and will not retain copies or memoranda of said
         information in any form whatsoever. This clause shall remain effective
         even after the cancellation or termination of this agreement for any
         reason.

5.       COMMISSIONS

         EnerTeck will pay AGENT a commission only for payments from sales
         actually received as outlined in Appendix "B". The aforesaid will apply
         to customers for the territory of representation covered by this
         Agreement, beginning on the effective date of this Agreement. EnerTeck
         will pay such commission to Agent within five (5) days following
         receipt of payment of invoices and forward invoice copies to the Agent
         in order to verify commission amounts owed by EnerTeck.

         The commission shall be paid to Agent's bank account in US dollars to
         any commercial bank in the USA designated by Agent to receive such
         payments.

         EnerTeck shall pay commissions to Agent on all commercial accounts in
         Agent's territory for as long as this Agreement in force and such
         commission payment for Active Commercial Accounts at the time of
         termination shall continue for five years from the effective date of
         termination of this Agreement, regardless of the reason for
         termination, or as Parties may mutually agree. An Active Commercial
         Account shall be defined for these purposes as any account that has
         purchased and paid for EnerTeck Products within the preceding
         twelve-month period.

         It is the right of EnerTeck, at its sole discretion, to accept or
         refuse any contract. Any EnerTeck decision to refuse a potential
         contract will not entitle the Agent to any right to commission.

         The Parties agree that from time to time as the Parties may agree,
         EnerTeck may make advance commission payments to Agent as a draw
         against future commissions and/or reimburse Agent for extraordinary
         business expenses. EnerTeck shall reimburse Agent for for business
         expenses incurred outside of the Territory at the request of EnerTeck..
         Any such payments to Agent by EnerTeck do not constitute an obligation
         by EnerTeck to engage or make payments to Agent except as outlined
         herein.

<PAGE>

AGENCY AGREEMENT                                               FEBRUARY 15, 2003
ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.
               &
ENERTECK CHEMICAL COMPANY, INC.


6.       PRICES: TERMS AND CONDITIONS OF SALE

         All sales shall be subject to EnerTeck's agreed prices, terms and
         conditions and such prices, terms and conditions are subject to change
         without notice, unless otherwise agreed in actual sales contracts with
         Agent's customers. EnerTeck shall provide Agent with current product
         prices on a regular basis, in writing, and such prices will remain
         effective until fifteen days after Agent receives a written notice of
         any price change. Agent shall not represent that Agent has authority to
         bind or commit EnerTeck to any prices or commercial terms other than as
         communicated in writing to Agent by EnerTeck.

7.       ORDERS AND REPORTS

         AGENT will, at EnerTeck's request furnish to EnerTeck periodic status
         reports giving to the fullest extent possible all known information
         regarding the status of tenders, bids, competitors, business and other
         relevant information.

8.       ADVERTISING

         Agent will NOT issue or publish any form of advertising or literature
         which in any way relates to EnerTeck or its products and services
         without first submitting the exact form and content thereof, together
         with information relating to the proposed dates and places of
         publication, to the EnerTeck notification address listed in Appendix
         "C".

         Prior to publication or distribution of the advertising or literature,
         AGENT will obtain EnerTeck's approval and authorization of the form,
         content and specifications of the proposed advertising or literature.
         AGENT will comply with all directions for changes in the form, content
         or specifications of such advertising or literature requested by
         EnerTeck. EnerTeck will provide to AGENT current sales literature,
         brochures, promotional items and technical information on the products
         and services covered by this Agreement, as necessary to assist in
         obtaining business per the Agreement. This material will be written in
         the English language only and will be provided at no charge to AGENT.
         All such information, brochures, literature, promotional items and
         technical information in the possession of AGENT shall be returned to
         EnerTeck upon request and/or upon the termination of this agreement.

9.       RELATIONSHIP OF THE PARTIES

         AGENT is now and will at all times act as and hold itself out as an
         independent entity. AGENT and EnerTeck, hereby agree that neither this
         Agreement nor any activity undertaken in accordance with it shall
         create any other relationship between the AGENT and EnerTeck. Neither
         parties have been granted by the other any right or authority to assume
         or create any obligation or responsibility for or on behalf of the
         other unless agreed otherwise to in writing.


<PAGE>

AGENCY AGREEMENT                                               FEBRUARY 15, 2003
ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.
               &
ENERTECK CHEMICAL COMPANY, INC.


10.      COMPETITION

         AGENT agrees that it shall (i) not furnish services similar to or that
         competes with the services being provided by AGENT to EnerTeck pursuant
         to this agreement to any third party in competition with EnerTeck, (ii)
         not directly engage in, (iii) not enter into a joint venture, or (iv)
         not acquire a company or other entity which engages in the particular
         business activities offered by EnerTeck in the territory.

11.      INDEMNITY

         EnerTeck agrees to protect, defend, indemnify and hold harmless and
         release AGENT, its parent, subsidiary and affiliated companies, its
         officers, directors and employees, from and against any manner of loss,
         liability, claim, damage, penalty or cost, including but not limited
         to, reasonable attorney's fees arising in connection with this
         Agreement that is asserted by any third party to the extent that such
         loss is caused by any product, act, or omission of EnerTeck.

         AGENT agrees to protect, defend, indemnify and hold harmless and
         release EnerTeck, its parent, subsidiary and affiliated companies, its
         officers, directors and employees, from and against any manner of loss,
         liability, claim, damage, penalty or cost, including but not limited
         to, reasonable attorney's fees arising in connection with this
         Agreement or that is asserted by any third party to the extent that
         such loss is caused by any act or omission of Agent.

12.      COMPLIANCE WITH U.S. LAW

         Notwithstanding anything to the contrary contained elsewhere in this
         Agreement or in any Exhibit hereto, performance by EnerTeck or of any
         of its obligations under the provisions of this Agreement shall be
         subject to the laws of the U.S., including, without limitation, U.S.
         Department of State, Treasury or Commerce Export Control or other U.S.
         Government regulations pertaining to export and re-export, transfer or
         disclosure, directly or indirectly, or products and/or technical data
         supplied under or in accordance with this agreement.

         Non-performance in whole or in part by EnerTeck because of said U.S.
         laws or regulations shall not be construed by any of the parties, and
         shall not constitute a default by EnerTeck of any obligation applicable
         to EnerTeck. Such non-performance shall not subject EnerTeck to any
         liability for damages and convey any right to AGENT to terminate this
         Agreement. Furthermore, that AGENT does not have the authority to,
         without prior written consent of EnerTeck, export any product made by
         the use of such technical data, directly or in-directly, to any such
         country as may from time to time be specified by the U.S. Department of
         State, Treasury or Commerce Export Control, as a country to which such
         exports are limited or to anyone in any such country or any national
         thereof. It also being understood that EnerTeck's power to give consent
         to such sales or products or components thereof, or the transfer or
         disclosure of technical data will be forbidden to give such consent,
         and in no event shall EnerTeck's failure to give such consent be
         grounds for a claim right or cause of action on the part of AGENT.

<PAGE>

AGENCY AGREEMENT                                               FEBRUARY 15, 2003
ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.
               &
ENERTECK CHEMICAL COMPANY, INC.


         AGENT covenants that it is familiar with the U.S. Foreign Corrupt
         Practices Act of 1977, as amended, "the Act", and it proposes and
         represents that neither Agent nor any of its shareholders, officers,
         directors, or employees will perform any service or action that would
         or might constitute any such violation.

13.      AMENDMENTS

         This Agreement may be amended only by written agreement of both Agent
         and EnerTeck.

14.      ASSIGNMENT

         This Agreement is not assignable, by operation of law or otherwise,
         without the prior written consent of the non-assigning party hereto.

         If both parties consent to an assignment, this Agreement is binding and
         enforceable against successors, successors in office and assigns of
         both parties. The respective parties agree to get approvals and
         concurrence of their successors and assigns.

15.      TERM AND TERMINATION

         (a)      This Agreement shall be effective as of the Effective Date and
                  shall continue in force for five (5) years thereafter unless
                  terminated as hereinafter provided. This Agreement shall be
                  evergreen and shall automatically renew for one-year periods
                  unless the terminating party gives a written one-year
                  cancellation notice to the other party. The term may be
                  extended, by mutual consent, for such periods thereafter
                  subject to termination as hereinafter provided.

         (b)      In the event of the termination at the initiative of Enerteck,
                  orders, letters of intent and contracts obtained through the
                  effort of Agent for EnerTeck's Products and Services at any
                  time within three (3) months following the termination of this
                  Agreement, provided the prospect for such orders with the name
                  of the customer is provided in writing by AGENT to EnerTeck
                  within thirty (30) days after termination of this Agreement,
                  shall entitle AGENT to a commission therein as if this
                  Agreement were still in force.

         (c)      This Agreement may be terminated by EnerTeck with immediate
                  effect and without recourse against EnerTeck, including but
                  not limited to liability for any damages, or penalty to AGENT
                  upon the occurrence of any of the following events:

                  (i)      Breaches any material obligation imposed by this
                           Agreement providing that such material breaches are
                           not reasonably remedied within sixty (60) days of
                           written notice of breach.

                  (ii)     Becomes insolvent, or subject to a petition in
                           bankruptcy filed by or against it or is placed under
                           the control of receiver, liquidator or committee of
                           creditors


<PAGE>

AGENCY AGREEMENT                                               FEBRUARY 15, 2003
ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.
               &
ENERTECK CHEMICAL COMPANY, INC.


                  (iii)    Assigns transfers or attempts to assign or transfer
                           this Agreement without EnerTeck's prior consent

                  (iv)     Ceases to function as a going concern or abandons the
                           territory of representation

                  (v)      A period of three hundred sixty five days (365 days)
                           from the Effective Date of this agreement passes
                           without EnerTeck receiving a valid and acceptable
                           purchase order of commercial quantities of EnerTeck
                           products in AGENT's Territory.

                           Nothing contained in, nor any action taken under,
                           this section (d) shall constitute a waiver of any
                           other right or remedy available against Agent for any
                           breach mentioned under item (i) hereinabove.

         (e)      Notwithstanding any termination of this agreement, EnerTeck
                  agrees to honor any ongoing contractual commitments that arise
                  pursuant to this Agreement.

16.      NOTICES

         All notices and other communications provided for herein shall be
         validly given, made or served, if in writing and delivered personally
         or sent by certified mail postage prepaid, to the addresses listed in
         Appendix "C"

         Or to such other address as any party hereto, may, from time to time,
         designate in writing delivered in like manner, reference Appendix "C".
         Notice given by mail, as set out above shall be deemed delivered when
         actually received at the appropriate address.

17.      ARBITRATION

         Any controversy or claim arising out of or relating to this Agreement,
         or the breach thereof, shall be settled by arbitration in the United
         States and conducted in the English language in Harris County, Texas,
         United States. In accordance with the then current rules of the
         International Chamber of Commerce, and judgment upon the award rendered
         by the Arbitrator(s) may be entered in any court sitting in Harris
         County, Texas, United States. In respect to any such arbitration
         proceedings, the prevailing party shall be entitled to receive, in
         addition to any other remedy, all costs and expenses incurred in such
         proceedings, including reasonable attorney's fees.

         This Agreement shall be constructed and enforced in accordance with the
         laws of the state of Texas in the United States of America and filed
         with the foreign government to the extent that such government
         requires.

18.      OTHER REPRESENTATION

         AGENT shall at EnerTeck's request provide EnerTeck a list of the
         companies for which it acts as representative or agent. Upon AGENT
         undertaking to represent any other enterprise during


<PAGE>

AGENCY AGREEMENT                                               FEBRUARY 15, 2003
ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.
               &
ENERTECK CHEMICAL COMPANY, INC.


         the effectiveness of this Agreement, AGENT shall promptly inform
         EnerTeck of such representation or agency relationship.

19.      SEVERABILITY

         If any provision or provisions of this Agreement shall be held to be in
         whole or in part invalid, illegal or unenforceable in any jurisdiction,
         or if any governmental agency or authority shall require the parties to
         delete any provision of this Agreement, such invalidity, illegality,
         unenforceability or deletion shall not impair or affect the remaining
         provisions of this Agreement or the validity or enforceability of such
         provision in any other jurisdiction.

         The parties shall endeavor, in good faith negotiations, to replace the
         invalid, illegal unenforceable or deleted provision by valid provisions
         the economic effect of which comes as close as legally possible to that
         of the invalid, illegal, unenforceable or deleted provision.

20.      DESCRIPTIVE HEADINGS

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

21.      COUNTERPARTS

         For the convenience of the parties, any number of counterparts of this
         Agreement may be requested by one or more parties hereto and each such
         counterpart shall be deemed to be an original instrument if agreed to
         and signed by both parties.

22.      PRIOR AGREEMENTS

         The foregoing terms and conditions represent the entire agreement
         between EnerTeck and AGENT with respect to the subject matter,
         irrespective of inconsistent or additional terms or conditions included
         in other documents of AGENT. There are no other promises, terms,
         conditions or obligations; oral or written, with respect hereto other
         than those contained herein.

23.      GENERAL PROVISIONS

         (a)      This agreement is made in the English language and in the
                  event of doubt in interpretation between this and any other
                  version into which this agreement may be translated; the
                  English language shall prevail.

         (b)      The parties agree that either party shall keep its own
                  personnel and equipment insured and each party will cover all
                  of its own insurance costs.


<PAGE>

AGENCY AGREEMENT                                               FEBRUARY 15, 2003
ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.
               &
ENERTECK CHEMICAL COMPANY, INC.


                                                 EXECUTED BY:

ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.    ENERTECK CHEMICAL COMPANY, INC.

-------------------------------                  -------------------------------
/S/                                              /s/
Francisco CS Gularte                             Kenneth S. O'Neill
President and CEO                                President & CEO


DATE: 18 FEB. 2003                               DATE: 27 FEB. 2003


<PAGE>

AGENCY AGREEMENT                                               FEBRUARY 15, 2003
ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.
               &
ENERTECK CHEMICAL COMPANY, INC.


                                  APPENDIX "A"

                                       TO

                                AGENCY AGREEMENT

                                     BETWEEN

                  ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.

                                       AND

                         ENERTECK CHEMICAL COMPANY, INC.

                                    TERRITORY

                               COUNTRY (COUNTRIES)
                               -------------------
                                     BRAZIL
                                    ARGENTINA
                                     ECUADOR
                                     URUGUAY
                                    PARAGUAY
                                      PERU
                                      CHILE
                                    COLUMBIA

         MINIMUM ANNUAL SALES VOLUMES TO MAINTAIN GEOGRAPHIC EXCLUSIVITY

Actual sales and/or customer contracts for sales representing the following
minimum Territorial sales volumes are required for the Agent to maintain
geographic sales exclusivity in the Territory. In the event that Agent does not
achieve the minimum sales volume in any given period as provided for herein,
EnerTeck may, at its sole option, appoint additional Agents or establish its own
sales initiative within the Territory. However, in the event that Agent loses
its territorial exclusivity, EnerTeck will respect Agent's active commercial
accounts and will not compete with Agent or allow any additionally appointed
agents to compete or interfere with Agent's active commercial accounts.


Calendar Year                       Volume of Enerburn Sold in Territory

2003                                20,000 Gallons
2004                                60,000 Gallons
2005 and all subsequent years       100,000 Gallons



<PAGE>

AGENCY AGREEMENT                                               FEBRUARY 15, 2003
ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.
               &
ENERTECK CHEMICAL COMPANY, INC.


APPENDIX "B"

                                       TO

                                AGENCY AGREEMENT

                                     BETWEEN

                  ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.

                                       AND

                         ENERTECK CHEMICAL COMPANY, INC.

                              COMMISSION SCHEDULES

The following commission schedules and commission basis prices are predicated on
bulk/isotank FOB Houston, Texas for EnerTeck products sold in US dollars and
supported by a standby letter of credit on a US Bank with net 30BL payment
terms. In the event of different terms of sale such as drummed product or CIF
sales, etc., the Parties will negotiate in good faith to adjust the commission
basis price to reflect the actual changes in netback price to EnerTeck.

FOR COMPANIA VALE DO RIO DOCE (CVRD), Agent shall be paid a commission for
volumes sold to CVRD in the amount of the difference between the bulk/isotank
FOB Houston, Texas sales price paid by CVRD and/or its subsidiaries and/or
affiliate companies to EnerTeck, and the commission basis price of USD 50.00 per
US gallon of Enerburn product.

FOR ALL OTHER NON-GOVERNMENT COMMERCIAL ACCOUNTS, Agent shall be paid a
commission representing twenty percent (20%) of the amount any invoice paid by a
customer in Agent's Territory.

FOR ALL GOVERNMENT ACCOUNTS (INCLUDING BR AND PETROBRAS), agent shall be paid a
commission representing twenty-five percent (25%) of the amount of any invoice
paid by a customer in Agent's Territory.


<PAGE>

AGENCY AGREEMENT                                               FEBRUARY 15, 2003
ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.
               &
ENERTECK CHEMICAL COMPANY, INC.


                                  APPENDIX "C"

                                       TO

                                AGENCY AGREEMENT

                                     BETWEEN

                  ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.

                                       AND

                         ENERTECK CHEMICAL COMPANY, INC.

                               CONTACT INFORMATION


ECHEMTRADE                                     AGENT
----------                                     -----

Francisco C S Gularte                          Kenneth S. O'Neill
President and CEO                              President
Rua Pio Correia 80, Bl.1 apt. 805              10701 Corporate Drive, Suite 293
Lagoa - Rio de Janeiro- Brasil                 Stafford, Texas 77477
22.461 240

Telephone 55-21-253-755585                     Telephone  (281)240-1787
Fax       55-21-253-755585                     Fax        (281)240-1828





<PAGE>

AGENCY AGREEMENT                                               FEBRUARY 15, 2003
ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.
               &
ENERTECK CHEMICAL COMPANY, INC.


                                  APPENDIX "D"

                                       TO

                                AGENCY AGREEMENT

                                     BETWEEN

                  ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.

                                       AND

                            ENERTECK CHEMICAL COMPANY

                          EXCLUDED CUSTOMERS / SERVICES


CUSTOMER                                      PRODUCTS/SERVICES
--------                                      -----------------

NONE                                          NONE