CLASS D COMMON STOCK PURCHASE WARRANT

EXHIBIT 10.6

NEITHER THE ISSUANCE AND SALE OF THE SECURITIES REPRESENTED BY THIS CERTIFICATE NOR THE SECURITIES INTO WHICH THESE SECURITIES ARE EXERCISABLE HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS. THE SECURITIES MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED OR ASSIGNED (I) IN THE ABSENCE OF (A) AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR (B) AN OPINION OF COUNSEL (WHICH COUNSEL SHALL BE SELECTED BY THE HOLDER), IN A GENERALLY ACCEPTABLE FORM, THAT REGISTRATION IS NOT REQUIRED UNDER SAID ACT OR (II) UNLESS SOLD PURSUANT TO RULE 144 OR RULE 144A UNDER SAID ACT. NOTWITHSTANDING THE FOREGOING, THE SECURITIES MAY BE PLEDGED IN CONNECTION WITH A BONA FIDE MARGIN ACCOUNT OR OTHER LOAN OR FINANCING ARRANGEMENT SECURED BY THE SECURITIES.

CLASS D COMMON STOCK PURCHASE WARRANT

No. 2009-D-001 Issue Date: May 7, 2009

CONVERTED ORGANICS INC., a corporation organized under the laws of the State of Delaware (the “Company”), hereby certifies that, for value received, IROQUOIS MASTER FUND LTD., 641 Lexington Avenue, 26th Floor, New York, NY 10022, Fax: (212) 207-3452, or its assigns (the “Holder”), is entitled, subject to the terms set forth below, to purchase from the Company six months from the Issue Date until 5:00 p.m., E.S.T on the fifth anniversary of the Issue Date (the “Expiration Date”), up to 350,000 fully paid and nonassessable shares of Common Stock at a per share purchase price of $1.50. The aforedescribed purchase price per share, as adjusted from time to time as herein provided, is referred to herein as the “Purchase Price.” The number and character of such shares of Common Stock and the Purchase Price are subject to adjustment as provided herein. The Company may reduce the Purchase Price for some or all of the Warrants, temporarily or permanently, provided such reduction is made as to all outstanding Warrants for all Holders of such Warrants. Capitalized terms used and not otherwise defined herein shall have the meanings set forth in that certain Subscription Agreement (the “Subscription Agreement”), dated as of May 7, 2009, entered into by the Company and the Holder.

As used herein the following terms, unless the context otherwise requires, have the following respective meanings:

(a) The term “Company” shall mean Converted Organics Inc., a Delaware corporation, and any corporation which shall succeed or assume the obligations of Converted Organics Inc. hereunder.

(b) The term “Common Stock” includes (i) the Company’s Common Stock, $0.0001 par value per share, as authorized on the date of the Subscription Agreement, and (ii) any other securities into which or for which any of the securities described in (i) may be converted or exchanged pursuant to a plan of recapitalization, reorganization, merger, sale of assets or otherwise.

(c) The term “Other Securities” refers to any stock (other than Common Stock) and other securities of the Company or any other person (corporate or otherwise) which the holder of the Warrant at any time shall be entitled to receive, or shall have received, on the exercise of the Warrant, in lieu of or in addition to Common Stock, or which at any time shall be issuable or shall have been issued in exchange for or in replacement of Common Stock or Other Securities pursuant to Section 4 herein or otherwise.

(d) The term “Warrant Shares” shall mean the Common Stock issuable upon exercise of this Warrant.

1.  Exercise of Warrant .

1.1. Number of Shares Issuable upon Exercise . From and after the Issue Date through and including the Expiration Date, the Holder hereof shall be entitled to receive, upon exercise of this Warrant in whole in accordance with the terms of subsection 1.2 or upon exercise of this Warrant in part in accordance with subsection 1.3, shares of Common Stock of the Company, subject to adjustment pursuant to Section 4.

1.2. Full Exercise . This Warrant may be exercised in full by the Holder hereof by delivery of an original or facsimile copy of the form of subscription attached as Exhibit A hereto (the “Subscription Form”) duly executed by such Holder and delivery within two days thereafter of payment, in cash, wire transfer or by certified or official bank check payable to the order of the Company, in the amount obtained by multiplying the number of shares of Common Stock for which this Warrant is then exercisable by the Purchase Price then in effect. The original Warrant is not required to be surrendered to the Company until it has been fully exercised.

1.3. Partial Exercise . This Warrant may be exercised in part (but not for a fractional share) by delivery of a Subscription Form in the manner and at the place provided in subsection 1.2 except that the amount payable by the Holder on such partial exercise shall be the amount obtained by multiplying (a) the number of whole shares of Common Stock designated by the Holder in the Subscription Form by (b) the Purchase Price then in effect. On any such partial exercise provided the Holder has surrendered the original Warrant, the Company, at its expense, will forthwith issue and deliver to or upon the order of the Holder hereof a new Warrant of like tenor, in the name of the Holder hereof or as such Holder (upon payment by such Holder of any applicable transfer taxes) may request, the whole number of shares of Common Stock for which such Warrant may still be exercised.

1.4. Fair Market Value . Fair Market Value of a share of Common Stock as of a particular date (the “Determination Date”) shall mean:

(a) If the Company’s Common Stock is traded on an exchange or is quoted on the NASDAQ Global Market, NASDAQ Global Select Market, the NASDAQ Capital Market, the New York Stock Exchange or the American Stock Exchange, LLC, then the average of the closing sale prices of the Common Stock for the five (5) Trading Days immediately prior to (but not including) the Determination Date;

(b) If the Company’s Common Stock is not traded on an exchange or on the NASDAQ Global Market, NASDAQ Global Select Market, the NASDAQ Capital Market, the New York Stock Exchange or the American Stock Exchange, Inc., but is traded on the OTC Bulletin Board or in the over-the-counter market or Pink Sheets, then the average of the closing bid and ask prices reported for the five (5) Trading Days immediately prior to (but not including) the Determination Date;

(c) Except as provided in clause (d) below and Section 3.1, if the Company’s Common Stock is not publicly traded, then as the Holder and the Company agree, or in the absence of such an agreement, by arbitration in accordance with the rules then standing of the American Arbitration Association, before a single arbitrator to be chosen from a panel of persons qualified by education and training to pass on the matter to be decided; or

(d) If the Determination Date is the date of a liquidation, dissolution or winding up, or any event deemed to be a liquidation, dissolution or winding up pursuant to the Company’s charter, then all amounts to be payable per share to holders of the Common Stock pursuant to the charter in the event of such liquidation, dissolution or winding up, plus all other amounts to be payable per share in respect of the Common Stock in liquidation under the charter, assuming for the purposes of this clause (d) that all of the shares of Common Stock then issuable upon exercise of all of the Warrants are outstanding at the Determination Date.

1.5. Company Acknowledgment . The Company will, at the time of the exercise of the Warrant, upon the request of the Holder hereof, acknowledge in writing its continuing obligation to afford to such Holder any rights to which such Holder shall continue to be entitled after such exercise in accordance with the provisions of this Warrant. If the Holder shall fail to make any such request, such failure shall not affect the continuing obligation of the Company to afford to such Holder any such rights.

1.6. Delivery of Stock Certificates, etc. on Exercise . The Company agrees that, provided the full purchase price listed in the Subscription Form is received as specified in Section 1.2, the shares of Common Stock purchased upon exercise of this Warrant shall be deemed to be issued to the Holder hereof as the record owner of such shares as of the close of business on the date on which delivery of a Subscription Form shall have occurred and payment made for such shares as aforesaid. As soon as practicable after the exercise of this Warrant in full or in part, and in any event within five (5) business days thereafter (“Warrant Share Delivery Date”), the Company at its expense (including the payment by it of any applicable issue taxes) will cause to be issued in the name of and delivered to the Holder hereof, or as such Holder (upon payment by such Holder of any applicable transfer taxes) may direct in compliance with applicable securities laws, a certificate or certificates for the number of duly and validly issued, fully paid and non-assessable shares of Common Stock (or Other Securities) to which such Holder shall be entitled on such exercise, plus, in lieu of any fractional share to which such Holder would otherwise be entitled, at the Company’s discretion either an extra share of Common Stock or cash equal to such fraction multiplied by the then Fair Market Value of one full share of Common Stock, together with any other stock or other securities and property (including cash, where applicable) to which such Holder is entitled upon such exercise pursuant to Section 1 or otherwise. The Company understands that a delay in the delivery of the Warrant Shares after the Warrant Share Delivery Date could result in economic loss to the Holder. As compensation to the Holder for such loss, the Company agrees to pay (as liquidated damages and not as a penalty) to the Holder for late issuance of Warrant Shares upon exercise of this Warrant the proportionate amount of $100 per business day after the Warrant Share Delivery Date for each $10,000 of Purchase Price of Warrant Shares for which this Warrant is exercised which are not timely delivered. The Company shall pay any payments incurred under this Section in immediately available funds upon demand. Furthermore, in addition to any other remedies which may be available to the Holder, in the event that the Company fails for any reason to effect delivery of the Warrant Shares by the Warrant Share Delivery Date, the Holder may revoke all or part of the relevant Warrant exercise by delivery of a notice to such effect to the Company, whereupon the Company and the Holder shall each be restored to their respective positions immediately prior to the exercise of the relevant portion of this Warrant, except that the liquidated damages described above shall be payable through the date notice of revocation or rescission is given to the Company.

1.7. Buy-In . In addition to any other rights available to the Holder, if the Company fails to deliver to a Holder the Warrant Shares as required pursuant to this Warrant, and the Holder or a broker on the Holder’s behalf, purchases (in an open market transaction or otherwise) shares of common stock to deliver in satisfaction of a sale by such Holder of the Warrant Shares which the Holder was entitled to receive from the Company (a “Buy-In”), then the Company shall pay in cash to the Holder (in addition to any remedies available to or elected by the Holder) the amount by which (A) the Holder’s total purchase price (including brokerage commissions, if any) for the shares of common stock so purchased exceeds (B) the aggregate Purchase Price of the Warrant Shares required to have been delivered together with interest thereon at a rate of 15% per annum, accruing until such amount and any accrued interest thereon is paid in full (which amount shall be paid as liquidated damages and not as a penalty). For example, if a Holder purchases shares of Common Stock having a total purchase price of $11,000 to cover a Buy-In with respect to $10,000 of Purchase Price of Warrant Shares to have been received upon exercise of this Warrant, the Company shall be required to pay the Holder $1,000, plus interest. The Holder shall provide the Company written notice indicating the amounts payable to the Holder in respect of the Buy-In.

2.  Cashless Exercise .

(a) Payment upon exercise may be made at the option of the Holder either in (i) cash, wire transfer or by certified or official bank check payable to the order of the Company equal to the applicable aggregate Purchase Price, (ii) by delivery of Common Stock issuable upon exercise of the Warrants in accordance with Section (b) below or (iii) by a combination of any of the foregoing methods, for the number of Common Stock specified in such form (as such exercise number shall be adjusted to reflect any adjustment in the total number of shares of Common Stock issuable to the holder per the terms of this Warrant) and the holder shall thereupon be entitled to receive the number of duly authorized, validly issued, fully-paid and non-assessable shares of Common Stock (or Other Securities) determined as provided herein. Notwithstanding the foregoing, the Holder shall not be permitted to utilize the “cashless” exercise provisions set forth in Section 2(b) below at any time during which the resale of the Common Stock underlying the Warrants is registered for public resale pursuant to the Act.

(b) Subject to the provisions herein to the contrary, if the Fair Market Value of one share of Common Stock is greater than the Purchase Price (at the date of calculation as set forth below), in lieu of exercising this Warrant for cash, the holder may elect to receive shares equal to the value (as determined below) of this Warrant (or the portion thereof being cancelled) by delivery of a properly endorsed Subscription Form delivered to the Company by any means described in Section 13, in which event the Company shall issue to the holder a number of shares of Common Stock computed using the following formula:

X= Y (A-B) A

Where X= the number of shares of Common Stock to be issued to the holder

For purposes of Rule 144 prom