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Exhibit 10.4
 
JOINDER TO
SECURITY AGREEMENT

This Joinder to Security Agreement (“Joinder”) is made on this ________, 2010
(the “Effective Date”) by  ________________ (“Investor”).

WHEREAS, as of the date hereof, Applied DNA Sciences, Inc., a Delaware
corporation (the “Company”) has issued and sold to the Investor a senior secured
convertible note (the “Investor Note”) in a private placement transaction (the
“Offering”);

WHEREAS, as part of the Offering, the Investor will become a party to that
certain Security Agreement (the “Security Agreement”), dated as of July 15, 2010
made by the Company in favor of Etico Capital, LLC, a limited liability company
organized under the laws of Delaware, as Collateral Agent for the Buyers (as
defined in the Security Agreement), pursuant to which the Investor Note will be
secured by a security interest in all of the assets of the Company.

NOW, THEREFORE, in consideration of the foregoing premises and the mutual
covenants and agreements contained herein, the parties hereto agree as follows:
 
1.           Joinder to Security Agreement.  Investor hereby agrees to be become
a party to and to be bound by all of the terms and provisions of the Security
Agreement as a Buyer for all purposes thereunder.  In addition, the Investor
Note will be deemed to be a “Note” (as defined in the Security Agreement).
 
2.           Applicable Law. This Joinder will be construed in accordance with,
and the rights of the parties governed by, the laws of the State of New York,
without regard to the choice of law provisions thereof.
 
3.           Counterparts; Incorporation.  This Joinder may be executed in any
number of counterparts, each of which shall be deemed an original and all of
which taken together shall constitute one and the same instrument.  The recitals
to this Joinder are hereby incorporated by reference and made a part hereof for
all purposes.
 

 
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IN WITNESS WHEREOF, the parties hereto have executed this Joinder as of the date
first above written.
 

 
[INVESTOR]
         
By:_________________________________
 
Name:
 
Title:

 
AGREED TO AND ACCEPTED:

 
APPLIED DNA SCIENCES, INC.,
a Delaware corporation
 
 
By:_____________________________
Dr. James A. Hayward
President and Chief Executive Officer
 

 
ETICO CAPITAL, LLC.,
a Delaware limited liability corporation
 
 
By:_____________________________
Scott A. Weisman
Managing Director