THIS COMMON STOCK PURCHASE WARRANT AND THE SECURITIES REPRESENTED HEREBY HAVE
NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND MAY NOT BE
TRANSFERRED IN VIOLATION OF SUCH ACT, THE RULES AND REGULATIONS THEREUNDER OR
THE PROVISIONS OF THIS COMMON STOCK PURCHASE WARRANT.

                    Number of Shares of Common Stock: 312,500
                                  Warrant No. 1

                          COMMON STOCK PURCHASE WARRANT

                           To Purchase Common Stock of

                      Commodore Applied Technologies, Inc.

            THIS IS TO CERTIFY THAT The Shaar Fund Ltd., or registered assigns,
is entitled, at any time from the Closing Date (as hereinafter defined) to the
Expiration Date (as hereinafter defined), to purchase from Commodore Applied
Technologies, Inc., a Delaware corporation (the "COMPANY"), 312,500 shares of
Common Stock (as hereinafter defined and subject to adjustment as provided
herein), in whole or in part, including fractional parts, at a purchase price
per share equal to 110% of the Market Price( as hereinafter defined and subject
to adjustment as provided herein), all on the terms and conditions and pursuant
to the provisions hereinafter set forth.

            1. DEFINITIONS

            As used in this Common Stock Purchase Warrant (this "WARRANT"), the
following terms have the respective meanings set forth below:

            "ADDITIONAL SHARES OF COMMON STOCK" shall mean all shares of Common
Stock issued by the Company after the Closing Date, other than Warrant Stock.

            "AMEX" shall mean the American Stock Exchange.

            "BOOK VALUE" shall mean, in respect of any share of Common Stock on
any date herein specified, the consolidated book value of the Company as of the
last day of any month immediately preceding such date, divided by the number of
Fully Diluted Outstanding shares of Common Stock as determined in accordance
with GAAP (assuming the payment of the exercise prices for such shares) by
PricewaterhouseCoopers LLC or any other firm of independent

<PAGE>

certified public accountants of recognized national standing selected by the
Company and reasonably acceptable to the Holder.

            "BUSINESS DAY" shall mean any day that is not a Saturday or Sunday
or a day on which banks are required or permitted to be closed in the State of
New York.

            "CLOSING DATE" shall have the meaning set forth in the Securities
Purchase Agreement.

            "COMMISSION" shall mean the Securities and Exchange Commission or
any other federal agency then administering the Securities Act and other federal
securities laws.

            "COMMON STOCK" shall mean (except where the context otherwise
indicates) the Common Stock, par value $0.001 per share, of the Company as
constituted on the Closing Date, and any capital stock into which such Common
Stock may thereafter be changed, and shall also include (i) capital stock of the
Company of any other class (regardless of how denominated) issued to the holders
of shares of Common Stock upon any reclassification thereof which is also not
preferred as to dividends or assets over any other class of stock of the Company
and which is not subject to redemption and (ii) shares of common stock of any
successor or acquiring corporation received by or distributed to the holders of
Common Stock of the Company in the circumstances contemplated by Section 4.4.

            "CONVERTIBLE SECURITIES" shall mean evidences of indebtedness,
shares of stock or other securities which are convertible into or exchangeable,
with or without payment of additional consideration in cash or property, for
shares of Common Stock, either immediately or upon the occurrence of a specified
date or a specified event.

            "CURRENT MARKET PRICE" means on any date of determination the
closing price of a Common Share on such day as reported on the Amex; provided,
if such security is listed and admitted to trading on the NASDAQ, the closing
bid price of a Common Share on such day as reported on the NASDAQ, or, if not
quoted or listed or admitted to trading on any national securities exchange or
quotation system, the closing bid price of such security on the over-the-counter
market on the day in question as reported by Bloomberg LP, or a similar
generally accepted reporting service, as the case may be.

            "CURRENT WARRANT PRICE" shall mean, in respect of a share of Common
Stock at any date herein specified, the price at which a share of Common Stock
may be purchased pursuant to this Warrant on such date, as set forth in the
first paragraph hereof.

            "EXCHANGE ACT" shall mean the Securities Exchange Act of 1934, as
amended, or any successor federal statute, and the rules and regulations of the
Commission thereunder, all as the same shall be in effect from time to time.

            "EXERCISE PERIOD" shall mean the period during which this Warrant is
exercisable pursuant to Section 2.1.

            "EXPIRATION DATE" shall mean the fifth anniversary of the Closing
Date.

                                      -2-

<PAGE>

            "FULLY DILUTED OUTSTANDING" shall mean, when used with reference to
Common Stock, at any date as of which the number of shares thereof is to be
determined, all shares of Common Stock Outstanding at such date and all shares
of Common Stock issuable in respect of this Warrant, outstanding on such date,
and other options or warrants to purchase, or securities convertible into,
shares of Common Stock outstanding on such date which would be deemed
outstanding in accordance with GAAP for purposes of determining Book Value or
net income per share.

            "GAAP" shall mean generally accepted accounting principles in the
United States of America as from time to time in effect.

            "HOLDER" shall mean the Person in whose name the Warrant or Warrant
Stock set forth herein is registered on the books of the Company maintained for
such purpose.

            "MARKET PRICE" per Common Share means the average of the closing bid
prices of the Common Shares as reported on the Amex for the five trading days
immediately preceding the Closing Date.

            "NASDAQ" means the Nasdaq National Market or the Nasdaq SmallCap
Market, as the case may be.

            "OTHER PROPERTY" shall have the meaning set forth in Section 4.4.

            "OUTSTANDING" shall mean, when used with reference to Common Stock,
at any date as of which the number of shares thereof is to be determined, all
issued shares of Common Stock, except shares then owned or held by or for the
account of the Company or any subsidiary thereof, and shall include all shares
issuable in respect of outstanding scrip or any certificates representing
fractional interests in shares of Common Stock.

            "PERSON" shall mean any individual, sole proprietorship,
partnership, joint venture, trust, incorporated organization, association,
corporation, institution, public benefit corporation, entity or government
(whether federal, state, county, city, municipal or otherwise, including,
without limitation, any instrumentality, division, agency, body or department
thereof).

            "REGISTRATION RIGHTS AGREEMENT" shall mean the Registration Rights
Agreement dated as of a date even herewith between the Company and The Shaar
Fund Ltd., as it may be amended from time to time.

            "RESTRICTED COMMON STOCK" shall mean shares of Common Stock which
are, or which upon their issuance on their exercise of this Warrant would be,
evidenced by a certificate bearing the restrictive legend set forth in Section
9.1(a).

            "SECURITIES ACT" shall mean the Securities Act of 1933, as amended,
or any successor federal statute, and the rules and regulations of the
Commission thereunder, all as the same shall be in effect at the time.

                                      -3-

<PAGE>

            "SECURITIES PURCHASE AGREEMENT" shall mean the Securities Purchase
Agreement dated as of a date even herewith between the Company and The Shaar
Fund Ltd., as it may be amended from time to time.

            "TRANSFER" shall mean any disposition of any Warrant or Warrant
Stock or of any interest in either thereof, which would constitute a sale
thereof within the meaning of the Securities Act.

            "TRANSFER NOTICE" shall have the meaning set forth in Section 9.2.

            "WARRANT PRICE" shall mean an amount equal to (i) the number of
shares of Common Stock being purchased upon exercise of this Warrant pursuant to
Section 2.1, multiplied by (ii) the Current Warrant Price as of the date of such
exercise.

            "WARRANT STOCK" shall mean the shares of Common Stock purchased by
the holders of the Warrants upon the exercise thereof.

            "WARRANTS" shall mean this Warrant and all warrants issued upon
transfer, division or combination of, or in substitution for, any thereof. All
Warrants shall at all times be identical as to terms and conditions and date,
except as to the number of shares of Common Stock for which they may be
exercised.

            2. EXERCISE OF WARRANT

            2.1 Manner of Exercise

            From and after April 30, 2000 and until 5:00 p.m., New York time, on
the Expiration Date, Holder may exercise this Warrant, on any Business Day, for
all or any part of the number of shares of Common Stock purchasable hereunder.

            In order to exercise this Warrant, in whole or in part, Holder shall
deliver to the Company at its principal office at 150 East 58th Street, Suite
3400, New York, New York 10155, or at the office or agency designated by the
Company pursuant to Section 12, (i) a written notice of Holder's election to
exercise this Warrant, which notice shall specify the number of shares of Common
Stock to be purchased, (ii) to the extent such exercise is not being effected
through a Cashless Exercise, payment of the Warrant Price in cash or wire
transfer or cashier's check drawn on a United States bank and (iii) this
Warrant. Such notice shall be substantially in the form of the subscription form
appearing at the end of this Warrant as Exhibit A, duly executed by Holder or
its agent or attorney. Upon receipt of the items referred to in clauses (i),
(ii) and (iii) above, the Company shall, as promptly as practicable, and in any
event within five Business Days thereafter, execute or cause to be executed and
deliver or cause to be delivered to Holder a certificate or certificates
representing the aggregate number of full shares of Common Stock issuable upon
such exercise, together with cash in lieu of any fraction of a share, as
hereinafter provided. The stock certificate or certificates so delivered shall
be, to the extent possible, in such denomination or denominations as Holder
shall request in the notice and shall be registered in the name of Holder or,
subject to Section 9, such other name as shall be designated in the notice. This
Warrant shall be deemed to have been exercised and such certificate or
certificates shall be

                                      -4-

<PAGE>

deemed to have been issued, and Holder or any other Person so designated to be
named therein shall be deemed to have become a holder of record of such shares
for all purposes, as of the date the notice, together with the cash or check or
checks and this Warrant, is received by the Company as described above and all
taxes required to be paid by Holder, if any, pursuant to Section 2.2 prior to
the issuance of such shares have been paid. If this Warrant shall have been
exercised in part, the Company shall, at the time of delivery of the certificate
or certificates representing Warrant Stock, deliver to Holder a new Warrant
evidencing the rights of Holder to purchase the unpurchased shares of Common
Stock called for by this Warrant, which new Warrant shall in all other respects
be identical with this Warrant, or, at the request of Holder, appropriate
notation may be made on this Warrant and the same returned to Holder.
Notwithstanding any provision herein to the contrary, the Company shall not be
required to register shares in the name of any Person who acquired this Warrant
(or part hereof) or any Warrant Stock otherwise than in accordance with this
Warrant.

            Simultaneously with the exercise of this Warrant, payment in full of
the Warrant Price may be made, at the option of the Holder, (i) by payment of
the Warrant Price in cash or by wire transfer or cashier's check drawn on a
United States bank, (ii) without payment of the Warrant Price by surrender of
certificate(s) evidencing the Warrants (the "WARRANT CERTIFICATE") in exchange
for a number of shares equal to the product of (l) the number of shares for
which such Warrant is exercisable with payment of the Warrant Price as of the
date of exercise and (2) the Cashless Exercise Ratio or (iii) by any combination
of (i) and (ii). For purposes of this Agreement, the "CASHLESS EXERCISE RATIO"
shall equal a fraction, the numerator of which is the excess of the Current
Market Price on the date of exercise over the Current Warrant Price as of the
date of exercise and the denominator of which is the Current Market Price on the
date of exercise. An exercise of a Warrant in accordance with the clause (ii) in
the first sentence of this paragraph is herein called a "CASHLESS EXERCISE."
Upon surrender of a Warrant Certificate representing more than one Warrant in
connection with the Holder's option to elect a Cashless Exercise, the number of
shares deliverable upon a Cashless Exercise shall be equal to the Cashless
Exercise Ratio multiplied by the product of (a) the number of Warrants that the
Holder specifies is to be exercised pursuant to a Cashless Exercise and (b) the
number of shares for which such Warrant is then exercisable (without giving
effect to the Cashless Exercise option). All provisions of this Agreement shall
be applicable with respect to an exercise of a Warrant Certificate pursuant to a
Cashless Exercise for less than the full number of Warrants represented thereby.

            2.2 Payment of Taxes and Charges

            All shares of Common Stock issuable upon the exercise of this
Warrant pursuant to the terms hereof shall be validly issued, fully paid and
nonassessable, freely tradable and without any preemptive rights. The Company
shall pay all expenses in connection with, and all taxes and other governmental
charges that may be imposed with respect to, the issue or delivery thereof,
unless such tax or charge is imposed by law upon Holder, in which case such
taxes or charges shall be paid by Holder. The Company shall not be required,
however, to pay any tax or other charge imposed in connection with any transfer
involved in the issue of any certificate for shares of Common Stock issuable
upon exercise of this Warrant in any name other than that of Holder, and in such
case the Company shall not be required to issue or deliver any stock

                                      -5-

<PAGE>

certificate until such tax or other charge has been paid or it has been
established to the satisfaction of the Company that no such tax or other charge
is due.

            2.3 Fractional Shares

            The Company shall not be required to issue a fractional share of
Common Stock upon exercise of any Warrant. As to any fraction of a share which
Holder would otherwise be entitled to purchase upon such exercise, the Company
shall pay a cash adjustment in respect of such final fraction in an amount equal
to the same fraction of the Market Price per share of Common Stock as of the
Closing Date.

            2.4 Continued Validity

            A holder of shares of Common Stock issued upon the exercise of this
Warrant, in whole or in part (other than a holder who acquires such shares after
the same have been publicly sold pursuant to a Registration Statement under the
Securities Act or sold pursuant to Rule 144 thereunder), shall continue to be
entitled with respect to such shares to all rights to which it would have been
entitled as Holder under Sections 9, 10 and 14 of this Warrant. The Company
will, at the time of exercise of this Warrant, in whole or in part, upon the
request of Holder, acknowledge in writing, in form reasonably satisfactory to
Holder, its continuing obligation to afford Holder all such rights; provided,
however, that if Holder shall fail to make any such request, such failure shall
not affect the continuing obligation of the Company to afford to Holder all such
rights.

            3. TRANSFER, DIVISION AND COMBINATION

            3.1 Transfer

            Subject to compliance with Section 9, transfer of this Warrant and
all rights hereunder, in whole or in part, shall be registered on the books of
the Company to be maintained for such purpose, upon surrender of this Warrant at
the principal office of the Company referred to in Section 2.1 or the office or
agency designated by the Company pursuant to Section 12, together with a written
assignment of this Warrant substantially in the form of Exhibit B hereto duly
executed by Holder or its agent or attorney and finds sufficient to pay any
transfer taxes payable upon the making of such transfer. Upon such surrender
and, if required, such payment, the Company shall, subject to Section 9, execute
and deliver a new Warrant or Warrants in the name of the assignee or assignees
and in the denomination specified in such instrument of assignment, and shall
issue to the assignor a new Warrant evidencing the portion of this Warrant not
so assigned, and this Warrant shall promptly be canceled. A Warrant, if properly
assigned in compliance with Section 9, may be exercised by a new Holder for the
purchase of shares of Common Stock without having a new warrant issued.

            3.2 Division and Combination

            Subject to Section 9, this Warrant may be divided or combined with
other Warrants upon presentation hereof at the aforesaid office or agency of the
Company, together with a written notice specifying the names and denominations
in which new Warrants are to be

                                      -6-

<PAGE>

issued, signed by Holder or its agent or attorney. Subject to compliance with
Section 3.1 and with Section 9, as to any transfer which may be involved in such
division or combination, the Company shall execute and deliver a new Warrant or
Warrants in exchange for the Warrant or Warrants to be divided or combined in
accordance with such notice.

            3.3 Expenses

            The Company shall prepare, issue and deliver at its own expense
(other than transfer taxes) the new Warrants or Warrants under this Section 3.

            3.4 Maintenance of Books

            The Company agrees to maintain, at its aforesaid office or agency,
books for the registration and the registration of transfer of the Warrants.

            4. ADJUSTMENTS

            The number of shares of Common Stock for which this Warrant is
exercisable, or the price at which such shares may be purchased upon exercise of
this Warrant, shall be subject to adjustment from time to time as set forth in
this Section 4. The Company shall give Holder notice of any event described
below which requires an adjustment pursuant to this Section 4 at the time of
such event.

            4.1 Stock Dividends, Subdivisions and Combinations

            If at any time the Company shall:

            (a) take a record of the holders of its Common Stock for the purpose
of entitling them to receive a dividend payable in, or other distribution of,
Additional Shares of Common Stock;

            (b) subdivide its outstanding shares of Common Stock into a larger
number of shares of Common Stock; or

            (c) combine its outstanding shares of Common Stock into a smaller
number of shares of Common Stock;

then (i) the number of shares of Common Stock for which this Warrant is
exercisable immediately after the occurrence of any such event shall be adjusted
to equal the number of shares of Common Stock which a record holder of the same
number of shares of Common Stock for which this Warrant is exercisable
immediately prior to the occurrence of such event would own or be entitled to
receive after the happening of such event, and (ii) the Current Warrant Price
shall be adjusted to equal (A) the Current Warrant Price multiplied by the
number of shares of Common Stock for which this Warrant is exercisable
immediately prior to the adjustment divided by (B) the number of shares for
which this Warrant is exercisable immediately after such adjustment.

            4.2 Certain Other Distributions

                                      -7-

<PAGE>

            If at any time the Company shall take a record of the holders of its
Common Stock for the purpose of entitling them to receive any dividend or other
distribution of:

            (a) cash;

            (b) any evidences of its indebtedness, any shares of its stock or
any other securities or property of any nature whatsoever (other than cash,
Convertible Securities or Additional Shares of Common Stock); or

            (c) any warrants or other rights to subscribe for or purchase any
evidences of its indebtedness, any shares of its stock or any other securities
or property of any nature whatsoever (other than cash, Convertible Securities or
Additional Shares of Common Stock);

then Holder shall be entitled to receive such dividend or distribution as if
Holder had exercised the Warrant. A reclassification of the Common Stock (other
than a change in par value, or from par value to no par value or from no par
value to par value) into shares of Common Stock and shares of any other class of
stock shall be deemed a distribution by the Company to the holders of its Common
Stock of such shares of such other class of stock within the meaning of this
Section 4.2 and, if the outstanding shares of Common Stock shall be changed into
a larger or smaller number of shares of Common Stock as a part of such
reclassification, such change shall be deemed a subdivision or combination, as
the case may be, of the outstanding shares of Common Stock within the meaning of
Section 4.1.

            4.3 Other Provisions Applicable to Adjustments under this Section

            The following provisions shall be applicable to the making of
adjustments of the number of shares of Common Stock for which this Warrant is
exercisable and the Current Warrant Price provided for in this Section 4:

            (a) WHEN ADJUSTMENTS TO BE MADE. The adjustments required by this
Section 4 shall be made whenever and as often as any specified event requiring
an adjustment shall occur. For the purpose of any adjustment, any specified
event shall be deemed to have occurred at the close of business on the date of
its occurrence.

            (b) FRACTIONAL INTERESTS. In computing adjustments under this
Section 4, fractional interests in Common Stock shall be taken into account to
the nearest 1/10th of a share.

            (c) WHEN ADJUSTMENT NOT REQUIRED. If the Company shall take a record
of the holders of its Common Stock for the purpose of entitling them to receive
a dividend or distribution or subscription or purchase rights and shall,
thereafter and before the distribution to stockholders thereof, legally abandon
its plan to pay or deliver such dividend, distribution, subscription or purchase
rights, then thereafter no adjustment shall be required by reason of the taking
of such record and any such adjustment previously made in respect thereof shall
be rescinded and annulled.

            (d) CHALLENGE TO GOOD FAITH DETERMINATION. Whenever the Board of
Directors of the Company shall be required to make a determination in good faith
of the fair value of any item under this Section 4, such determination may be
challenged in good faith by

                                      -8-

<PAGE>

the Holder, and any dispute shall be resolved by an investment banking firm of
recognized national standing selected by the Company and acceptable to Holder.

            4.4 Reorganization, Reclassification, Merger, Consolidation or
                Disposition of Assets

            In case the Company shall reorganize its capital, reclassify its
capital stock, consolidate or merge with or into another corporation (where the
Company is not the surviving corporation or where there is a change in or
distribution with respect to the Common Stock of the Company), or sell, transfer
or otherwise dispose of all or substantially all its property, assets or
business to another corporation and, pursuant to the terms of such
reorganization, reclassification, merger, consolidation or disposition of
assets, shares of common stock of the successor or acquiring corporation, or any
cash, shares of stock or other securities or property of any nature whatsoever
(including warrants or other subscription or purchase rights) in addition to or
in lieu of common stock of the successor or acquiring corporation ("OTHER
PROPERTY"), are to be received by or distributed to the holders of Common Stock
of the Company, then Holder shall have the right thereafter to receive, upon
exercise of the Warrant, the number of shares of common stock of the successor
or acquiring corporation or of the Company, if it is the surviving corporation,
and Other Property receivable upon or as a result of such reorganization,
reclassification, consolidation or disposition of assets by a holder of the
number of shares of Common Stock for which this Warrant is exercisable
immediately prior to such event. In case of any such reorganization,
reclassification, merger, consolidation or disposition of assets, the successor
or acquiring corporation (if other than the Company) shall expressly assume the
due and punctual observance and performance of each and every covenant and
condition of this Warrant to be performed and observed by the Company and all
the obligations and liabilities hereunder, subject to such modifications as may
be deemed appropriate (as determined by resolution of the Board of Directors of
the Company) in order to provide for adjustments of shares of Common Stock for
which this Warrant is exercisable which shall be as nearly equivalent as
practicable to the adjustments provided for in this Section 4. For purposes of
this Section 4.4, "COMMON STOCK OF THE SUCCESSOR OR ACQUIRING CORPORATION" shall
include stock of such corporation of any class which is not preferred as to
dividends or assets over any other class of stock of such corporation and which
is not subject to redemption and shall also include any evidences of
indebtedness, shares of stock or other securities which are convertible into or
exchangeable for any such stock, either immediately or upon the arrival of a
specified date or the happening of a specified event and any warrants or other
rights to subscribe for or purchase any such stock. The foregoing provisions of
this Section 4.4 still similarly apply to successive reorganizations,
reclassifications, mergers, consolidations or disposition of assets.

            4.5 Other Action Affecting Common Stock

            In case at any time or from time to time the Company shall take any
action in respect of its Common Stock, other than any action described in this
Section 4, which would have a materially adverse effect upon the rights of
Holder, the number of shares of Common Stock and/or the purchase price thereof
shall be adjusted in such manner as may be equitable in the circumstances, as
determined in good faith by the Board of Directors of the Company.

            4.6 Certain Limitations

                                      -9-

<PAGE>

            Notwithstanding anything herein to the contrary, the Company agrees
not to enter into any transaction which, by reason of any adjustment hereunder,
would cause the Current Warrant Price to be less than the par value per share of
Common Stock.

            5. NOTICES TO HOLDER

            5.1 Notice of Adjustments

            Whenever the number of shares of Common Stock for which this Warrant
is exercisable, or whenever the price at which a share of such Common Stock may
be purchased upon exercise of the Warrants, shall be adjusted pursuant to
Section 4, the Company shall forthwith prepare a certificate to be executed by
the chief financial officer of the Company setting forth, in reasonable detail,
the event requiring the adjustment and the method by which such adjustment was
calculated (including a description of the basis on which the Board of Directors
of the Company determined the fair value of any evidences of indebtedness,
shares of stock, other securities or property or warrants or other subscription
or purchase rights referred to in Section 4.2), specifying the number of shares
of Common Stock for which this Warrant is exercisable and (if such adjustment
was made pursuant to Section 4.4 or 4.5) describing the number and kind of any
other shares of stock or Other Property for which this Warrant is exercisable,
and any change in the purchase price or prices thereof, after giving effect to
such adjustment or change. The Company shall promptly cause a signed copy of
such certificate to be delivered to the Holder in accordance with Section 14.2.
The Company shall keep at its office or agency designated pursuant to Section 12
copies of all such certificates and cause the same to be available for
inspection at said office during normal business hours by the Holder or any
prospective purchaser of a Warrant designated by Holder.

            5.2 Notice of Corporate Action

            If at any time:

            (a) the Company shall take a record of the holders of its Common
Stock for the purpose of entitling them to receive a dividend or other
distribution, or any right to subscribe for or purchase any evidences of its
indebtedness, any shares of stock of any class or any other securities or
property, or to receive any other right; or

            (b) there shall be any capital reorganization of the Company, any
reclassification or recapitalization of the capital stock of the Company or any
consolidation or merger of the Company with, or any sale, transfer or other
disposition of all or substantially all the property, assets or business of the
Company to, another corporation; or

            (c) there shall be a voluntary or involuntary dissolution,
liquidation or winding up of the Company;

then, in any one or more of such cases, the Company shall give to Holder (i) at
least 30 days' prior written notice of the date on which a record date shall be
selected for such dividend, distribution or right or for determining rights to
vote in respect of any such reorganization, reclassification, merger,
consolidation, sale, transfer, disposition, dissolution, liquidation or

                                      -10-

<PAGE>

winding up, and (ii) in the case of any such reorganization, reclassification,
merger, consolidation, sale, transfer, disposition, dissolution, liquidation or
winding up, at least 30 days' prior written notice of the date when the same
shall take place. Such notice in accordance with the foregoing clause also shall
specify (i) the date on which any such record is to be taken for the purpose of
such dividend, distribution or right, the date on which the holders of Common
Stock shall be entitled to any such dividend, distribution or right, and the
amount and character thereof, and (ii) the date on which any such
reorganization, reclassification, merger, consolidation, sale, transfer,
disposition, dissolution, liquidation or winding up is to take place and the
time, if any such time is to be fixed, as of which the holders of Common Stock
shall be entitled to exchange their shares of Common Stock for securities or
other property deliverable upon such reorganization, reclassification, merger,
consolidation, sale, transfer, disposition, dissolution, liquidation or winding
up. Each such written notice shall be sufficiently given if addressed to Holder
at the last address of Holder appearing on the books of the Company and
delivered in accordance with Section 14.2.

            6. NO IMPAIRMENT

            The Company shall not by any action, including, without limitation,
amending its certificate of incorporation or through any reorganization,
transfer of assets, consolidation, merger, dissolution, issue or sale of
securities or other voluntary action, avoid or seek to avoid the observance or
performance of any of the terms of this Warrant, but will at all times in good
faith assist in the carrying out of all such terms and in the taking of all such
actions as may be necessary or appropriate to protect the rights of Holder
against impairment. Without limiting the generality of the foregoing, the
Company will (a) not increase the par value of any shares of Common Stock
receivable upon the exercise of this Warrant above the amount payable therefor
upon such exercise immediately prior to such increase in par value, (b) take all
such action as may be necessary or appropriate in order that the Company may
validly and legally issue fully paid and nonassessable shares of Common Stock
upon the exercise of this Warrant, and (c) use its best efforts to obtain all
such authorizations, exemptions or consents from any public regulatory body
having jurisdiction thereof as may be necessary to enable the Company to perform
its obligations under this Warrant.

            Upon the request of Holder, the Company will at any time during the
period this Warrant is outstanding acknowledge in writing, in form satisfactory
to Holder, the continuing validity of this Warrant and the obligations of the
Company hereunder.

            7. RESERVATION AND AUTHORIZATION OF COMMON STOCK

            From and after the Closing Date, the Company shall at all times
reserve and keep available for issue upon the exercise of Warrants such number
of its authorized but unissued shares of Common Stock as will be sufficient to
permit the exercise in full of all outstanding Warrants. All shares of Common
Stock which shall be so issuable, when issued upon exercise of any Warrant and
payment therefor in accordance with the terms of such Warrant, shall be duly and
validly issued and fully paid and nonassessable and not subject to preemptive
rights.

                                      -11-

<PAGE>

            Before taking any action which would cause an adjustment reducing
the Current Warrant Price below the then par value, if any, of the shares of
Common Stock issuable upon exercise of the Warrants, the Company shall take any
corporate action which may be necessary in order that the Company may validly
and legally issue fully paid and nonassessable shares of such Common Stock at
such adjusted Current Warrant Price.

            Before taking any action which would result in an adjustment in the
number of shares of Common Stock for which this Warrant is exercisable or in the
Current Warrant Price, the Company shall obtain all such authorizations or
exemptions thereof, or consents thereto, as may be necessary from any public
regulatory body or bodies having jurisdiction thereof.

            8. TAKING OF RECORD; STOCK AND WARRANT TRANSFER BOOKS

            In the case of all dividends or other distributions by the Company
to the holders of its Common Stock with respect to which any provision of
Section 4 refers to the taking of record of such holders, the Company will in
each case take such a record and will take such record as of the close of
business on a Business Day. The Company will not at any time, except upon
dissolution, liquidation or winding up of the Company, close its stock transfer
books or Warrant transfer books so as to result in preventing or delaying the
exercise or transfer of any Warrant.

            9. RESTRICTIONS ON TRANSFERABILITY

            The Warrants and the Warrant Stock shall not be transferred,
hypothecated or assigned before satisfaction of the conditions specified in this
Section 9, which conditions are intended to ensure compliance with the
provisions of the Securities Act with respect to the Transfer of any Warrant or
any Warrant Stock. Holder, by acceptance of this Warrant, agrees to be bound by
the provisions of this Section 9.

            9.1 Restrictive Legend

            (a) Holder, by accepting this Warrant and any Warrant Stock agrees
that this Warrant and the Warrant Stock issuable upon exercise hereof may not be
assigned or otherwise transferred unless and until (i) the Company has received
an opinion of counsel for Holder that such securities may be sold pursuant to an
exemption from registration under the Securities Act or (ii) a registration
statement relating to such securities has been filed by the Company and declared
effective by the Commission.

            Each certificate for Warrant Stock issuable hereunder shall bear a
legend as follows until such securities have been sold pursuant to an effective
registration statement under the Securities Act:

            "THESE SECURITIES HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT
            OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR THE SECURITIES LAWS
            OF ANY STATE, AND ARE BEING OFFERED AND SOLD

                                      -12-

<PAGE>

            PURSUANT TO AN EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE
            SECURITIES ACT AND SUCH LAWS. THESE SECURITIES MAY NOT BE SOLD OR
            TRANSFERRED EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
            UNDER THE SECURITIES ACT OR PURSUANT TO AN AVAILABLE EXEMPTION FROM
            THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT OR SUCH OTHER
            LAWS."

            (b) Except as otherwise provided in this Section 9, the Warrant
shall be stamped or otherwise imprinted with a legend in substantially the
following form:

            "THIS WARRANT AND THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN
            REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND MAY NOT
            BE TRANSFERRED IN VIOLATION OF SUCH ACT, THE RULES AND REGULATIONS
            THEREUNDER OR THE PROVISIONS OF THIS WARRANT."

            9.2 Notice of Proposed Transfers

            Prior to any Transfer or attempted Transfer of any Warrants or any
shares of Restricted Common Stock, the Holder shall give ten days' prior written
notice (a "TRANSFER NOTICE") to the Company of Holder's intention to effect such
Transfer, describing the manner and circumstances of the proposed Transfer, and
obtain from counsel to Holder who shall be reasonably satisfactory to the
Company, an opinion that the proposed Transfer of such Warrants or such
Restricted Common Stock may be effected without registration under the
Securities Act. After receipt of the Transfer Notice and opinion, the Company
shall, within five days thereof, notify the Holder as to whether such opinion is
reasonably satisfactory and, if so, such holder shall thereupon be entitled to
Transfer such Warrants or such Restricted Common Stock, in accordance with the
terms of the Transfer Notice. Each certificate, if any, evidencing such shares
of Restricted Common Stock issued upon such Transfer shall bear the restrictive
legend set forth in Section 9.1(a), and the Warrant issued upon such Transfer
shall bear the restrictive legend set forth in Section 9.1(b), unless in the
opinion of such counsel such legend is not required in order to ensure
compliance with the Securities Act. Holder shall not be entitled to Transfer
such Warrants or such Restricted Common Stock until receipt of notice from the
Company under this Section 9.2(a) that such opinion is reasonably satisfactory.

            9.3 Required Registration

            Pursuant to the terms and conditions set forth in Registration
Rights Agreement, the Company shall prepare and file with the Commission not
later than the 75th day after the Closing Date, a Registration Statement
relating to the offer and sale of the Common Stock issuable upon exercise of the
Warrants and shall use its best efforts to cause the Commission to declare such
Registration Statement effective under the Securities Act as promptly as
practicable but no later than April 30, 2000.

                                      -13-

<PAGE>

            9.4 Termination of Restrictions

            Notwithstanding the foregoing provisions of Section 9, the
restrictions imposed by this Section upon the transferability of the Warrants,
the Warrant Stock and the Restricted Common Stock (or Common Stock issuable upon
the exercise of the Warrants) and the legend requirements of Section 9.1 shall
terminate as to any particular Warrant or share of Warrant Stock or Restricted
Common Stock (or Common Stock issuable upon the exercise of the Warrants) (i)
when and so long as such security shall have been effectively registered under
the Securities Act and disposed of pursuant thereto or (ii) when the Company
shall have received an opinion of counsel reasonably satisfactory to it that
such shares may be transferred without registration thereof under the Securities
Act. Whenever the restrictions imposed by Section 9 shall terminate as to this
Warrant, as hereinabove provided, the Holder hereof shall be entitled to receive
from the Company upon written request of the Holder, at the expense of the
Company, a new Warrant bearing the following legend in place of the restrictive
legend set forth hereon:

            "THE RESTRICTIONS ON TRANSFERABILITY OF THE WITHIN WARRANT CONTAINED
            IN SECTION 9 HEREOF TERMINATED ON _______, ______, AND ARE OF NO
            FURTHER FORCE AND EFFECT."

All Warrants issued upon registration of transfer, division or combination of,
or in substitution for, any Warrant or Warrants entitled to bear such legend
shall have a similar legend endorsed thereon. Whenever the restrictions imposed
by this Section shall terminate as to any share of Restricted Common Stock, as
hereinabove provided, the holder thereof shall be entitled to receive from the
Company, at the Company's expense, a new certificate representing such Common
Stock not bearing the restrictive legend set forth in Section 9.1(a).

            9.5 Listing on Securities Exchange

            If the Company shall list any shares of Common Stock on any
securities exchange or quotation system, it will, at its expense, list thereon,
maintain and, when necessary, increase such listing of, all shares of Common
Stock issued or, to the extent permissible under the applicable securities
exchange rules, issuable upon the exercise of this Warrant so long as any shares
of Common Stock shall be so listed during any such Exercise Period.

            10. SUPPLYING INFORMATION

            The Company shall cooperate with Holder in supplying such
information as may be reasonably necessary for Holder to complete and file any
information reporting forms presently or hereafter required by the Commission as
a condition to the availability of an exemption from the Securities Act for the
sale of any Warrant or Restricted Common Stock.

            11. LOSS OR MUTILATION

            Upon receipt by the Company from Holder of evidence reasonably
satisfactory to it of the ownership of and the loss, theft, destruction or
mutilation of this Warrant and indemnity reasonably satisfactory to it (it being
understood that the written agreement of the Holder shall be

                                      -14-

<PAGE>

sufficient indemnity), and in case of mutilation upon surrender and cancellation
hereof, the Company will execute and deliver in lieu hereof a new Warrant of
like tenor to Holder; provided, in the case of mutilation no indemnity shall be
required if this Warrant in identifiable form is surrendered to the Company for
cancellation.

            12. OFFICE OF THE COMPANY

            As long as any of the Warrants remain outstanding, the Company shall
maintain an office or agency (which may be the principal executive offices of
the Company) where the Warrants may be presented for exercise, registration of
transfer, division or combination as provided in this Warrant.

            13. LIMITATION OF LIABILITY

            No provision hereof, in the absence of affirmative action by Holder
to purchase shares of Common Stock, and no enumeration herein of the rights or
privileges of Holder hereof, shall give rise to any liability of Holder for the
purchase price of any Common Stock or as a stockholder of the Company, whether
such liability is asserted by the Company or by creditors of the Company.

            14. MISCELLANEOUS

            14.1 Nonwaiver and Expenses

            No course of dealing or any delay or failure to exercise any right
hereunder on the part of Holder shall operate as a waiver of such right or
otherwise prejudice Holder's rights, powers or remedies. If the Company fails to
make, when due, any payments provided for hereunder, or fails to comply with any
other provision of this Warrant, the Company shall pay to Holder such amounts as
shall be sufficient to cover any costs and expenses including, without
limitation, reasonable attorneys' fees, including those of appellate
proceedings, incurred by Holder in collecting any amounts due pursuant hereto or
in otherwise enforcing any of its rights, powers or remedies hereunder.

            14.2 Notice Generally

            Except as may be otherwise provided herein, any notice or other
communication or delivery required or permitted hereunder shall be in writing
and shall be delivered personally or sent by certified mail, postage prepaid, or
by a nationally recognized overnight courier service, and shall be deemed given
when so delivered personally or by overnight courier service, or, if mailed,
three days after the date of deposit in the United States mails, as follows:

                                      -15-

<PAGE>

            (a)   if to the Company, to:

                  Commodore Applied Technologies, Inc.
                  150 East 58th Street, Suite 3400
                  New York, NY 10155
                  Attention:
                  (212) 308-5800
                  (212) 752-0731 (Fax)

                  with a copy to:

                  Greenberg Traurig
                  200 Park Avenue
                  New York, NY 10166
                  Attention: Stephen A. Weiss, Esq.
                  (212) 801-9253
                  (212) 801-6400 (fax)

            (b)   if to the Holder, to:

                  The Shaar Fund Ltd.,
                  c/o Levinson Capital Management
                  2 World Trade Center, Suite 1820
                  New York, NY 10048
                  Attention: Samuel Levinson
                  (212) 432-7711
                  (212) 432-7771 (Fax)

                  with a copy to:

                  Cadwalader, Wickersham & Taft
                  100 Maiden Lane
                  New York, NY 10038
                  Attention: Dennis J. Block, Esq.
                  (212) 504-5555
                  (212) 504-5557 (Fax)

The Company or the Holder may change the foregoing address by notice given
pursuant to this Section 14.2.

            14.3 Indemnification

            The Company agrees to indemnify and hold harmless Holder from and
against any liabilities, obligations, losses, damages, penalties, actions,
judgments, suits, claims, costs, attorneys' fees, expenses and disbursements of
any kind which may be imposed upon, incurred by or asserted against Holder in
any manner relating to or arising out of any failure by the

                                      -16-

<PAGE>

Company to perform or observe in any material respect any of its covenants,
agreements, undertakings or obligations set forth in this Warrant; provided,
however, that the Company will not be liable hereunder to the extent that any
liabilities, obligations, losses, damages, penalties, actions, judgments, suits,
claims, costs, attorneys' fees, expenses or disbursements are found in a final
nonappealable judgment by a court to have resulted from Holder's gross
negligence, bad faith or willful misconduct in its capacity as a stockholder or
warrantholder of the Company.

            14.4 Remedies

            Holder in addition to being entitled to exercise all rights granted
by law, including recovery of damages, will be entitled to specific performance
of its rights under Section 9 of this Warrant. The Company agrees that monetary
damages would not be adequate compensation for any loss incurred by reason of a
breach by it of the provisions of Section 9 of this Warrant and hereby agrees to
waive the defense in any action for specific performance that a remedy at law
would be adequate.

            14.5 Successors and Assigns

            Subject to the provisions of Sections 3.1 and 9, this Warrant and
the rights evidenced hereby shall inure to the benefit of and be binding upon
the successors of the Company and the successors and assigns of Holder. The
provisions of this Warrant are intended to be for the benefit of all Holders
from time to time of this Warrant and, with respect to Section 9 hereof, holders
of Warrant Stock, and shall be enforceable by any such Holder or holder of
Warrant Stock.

            14.6 Amendment

            This Warrant and all other Warrants may be modified or amended or
the provisions hereof waived with the written consent of the Company and Holder.

            14.7 Severability

            Wherever possible, each provision of this Warrant shall be
interpreted in such manner as to be effective and valid under applicable law,
but if any provision of this Warrant shall be prohibited by or invalid under
applicable law, such provision shall only be ineffective to the extent of such
prohibition or invalidity, without invalidating the remainder of such provision
or the remaining provisions of this Warrant.

            14.8 Headings

            The headings used in this Warrant are for the convenience of
reference only and shall not, for any purpose, be deemed a part of this Warrant.

            14.9 Governing Law

            This Warrant shall be governed by the laws of the State of New York,
without regard to the provisions thereof relating to conflicts of law.

                                      -17-

<PAGE>

                           [SIGNATURE PAGE FOLLOWS.]

                                      -18-

<PAGE>

            In Witness Whereof, the Company has caused this Warrant to be duly
executed and its corporate seal to be impressed hereon and attested by its
Secretary or an Assistant Secretary.

Dated: October __, 1999

                                            Commodore Applied Technologies, Inc.

                                            By: /s/ Paul Hannesson
                                               ---------------------------------
                                              Name: Paul Hannesson
                                              Title: CEO

Attest:

By: /s/ James M. DeAngelis
    ---------------------------------
    Name: James M. DeAngelis
    Title: Vice President, Treasurer

<PAGE>

                                                                       EXHIBIT A

                                SUBSCRIPTION FORM

                 [To be executed only upon exercise of Warrant]

            The undersigned registered owner of this Warrant irrevocably
exercises this Warrant for the purchase of __________ shares of Common Stock of
Commodore Applied Technologies, Inc. and herewith makes payment therefor, all at
the price and on the terms and conditions specified in this Warrant and requests
that certificates for the shares of Common Stock hereby purchased (and any
securities or other property issuable upon such exercise) be issued in the name
of and delivered to

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

whose address is

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

and, if such shares of Common Stock shall not include all of the shares of
Common Stock issuable as provided in this Warrant, that a new Warrant of like
tenor and date for the balance of the shares of Common Stock issuable hereunder
be delivered to the undersigned.

                                         ---------------------------------------
                                               (Name of Registered Owner)

                                         ---------------------------------------
                                             (Signature of Registered Owner)

                                         ---------------------------------------
                                                    (Street Address)

                                         ---------------------------------------
                                             (City)    (State)   (Zip Code)

                                       A-1

<PAGE>

                          NOTICE: The signature on this
                      subscription must correspond with the
                      name as written upon the face of the
                       within Warrant in every particular,
                      without alteration or enlargement or
                             any change whatsoever.

                                      A-2

<PAGE>

                                                                       EXHIBIT B

                                 ASSIGNMENT FORM

            FOR VALUE RECEIVED the undersigned registered owner of this Warrant
hereby sells, assigns and transfers unto the Assignee named below all of the
rights of the undersigned under this Warrant, with respect to the number of
shares of Common Stock set forth below:

                                                                No. of Shares of
      Name and Address of Assignee                                Common Stock
      ----------------------------                                ------------

and does hereby irrevocably constitute and appoint

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

attorney-in-fact to register such transfer on the books of Commodore Applied
Technologies, Inc. maintained for the purpose, with full power of substitution
in the premises.

Dated:____________________________

                                         ---------------------------------------
                                                    (Print Name)

                                         ---------------------------------------
                                                     (Signature)

                                         ---------------------------------------
                                               (Print Name of Witness)

                                         ---------------------------------------
                                                (Witness's Signature)

                          NOTICE: The signature on this
                       assignment must correspond with the
                      name as written upon the face of the
                       within Warrant in every particular,
                      without alteration or enlargement or
                             any change whatsoever.

                                       B-l