Know all by these presents, that the undersigned hereby constitutes and
appoints Steve T. Laflin the undersigned's true and lawful attorney-in-fact
to:  (1) execute for and on behalf of the undersigned, in the
undersigned's capacity as an officer and/or director of International
Isotopes Inc. (the "Company"),Forms 3, 4 and 5 (including amendments
thereto) in accordance with Section 16(a) of the Securities Exchange Act
of 1934 and the rules and regulations thereunder and a Form ID, Uniform
Application for Access Codes to File on Edgar;(2) do and perform any and
all acts for and on behalf of the undersigned which may be necessary or
desirable to complete and execute any such Forms 3, 4 or 5 or Form ID and
timely file such forms (including amendments thereto) and application with
the United States Securities and Exchange Commission and any stock exchange
or similar authority; and (3) take any other action of any type whatsoever
in connection with the foregoing which, in the opinion of such
attorney-in-fact, may be of benefit to, in the best interest of, or
legally required by, the undersigned, it being understood that the documents
executed by such attorney-in-fact on behalf of the undersigned pursuant to
this Power of Attorney shall be in such form and shall contain such terms
And conditions as such attorney-in-fact may approve in such attorney-in-fact's
discretion.

The undersigned hereby grants to such attorney-in-fact full power
and authority to do and perform any and every act and thing whatsoever
requisite, necessary or proper to be done in the exercise of any of the rights
and powers herein granted, as fully to all intents and purposes as the
undersigned might or could do if personally present, with full power of
substitution or revocation, hereby ratifying and confirming all that such
attorney-in-fact, or such attorney-in-fact's substitute or substitutes,
shall lawfully do or cause to be done by virtue of this power of attorney and
the rights and powers herein granted.  The undersigned acknowledges that the
foregoing attorney-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming, nor is the Company assuming, any of the
undersigned's responsibilities to comply with Section 16 of the Securities
Exchange Act of 1934. The undersigned agrees that such attorney-in-fact
herein may rely entirely on information furnished orally or in writing by the
undersigned to such attorney-in-fact.  The undersigned also agrees to indemnify
and hold harmless the Company and such attorney-in-fact against any losses,
claims, damages or liabilities (or actions in these respects) that arise out
of or are based upon any untrue statements or omission of necessary facts in
the information provided by the undersigned to such attorney-in fact for
purposes of executing, acknowledging, delivering or filing Forms 3, 4 or 5
(including amendments thereto) or Form ID and agrees to reimburse the Company
and such attorney-in-fact for any legal or other expenses reasonably incurred
in connection with investigating or

defending against any such loss,
claim, damage, liability or action.


This Power of Attorney supersedes any power of attorney previously
executed by the undersigned regarding the purposes outlined in the first
paragraph hereof ("Prior Powers of Attorney"), and the authority of the
attorney-in-fact named in any Prior Powers of Attorney is hereby revoked.


This Power of Attorney shall remain in full force and effect until
the undersigned is no longer required to file Forms 3, 4 or 5 with respect
to the undersigned's holdings of and transactions in securities issued by the
Company, unless earlier (a) revoked by the undersigned in a signed writing
delivered to the foregoing attorneys-in-fact or (b) superseded by a new
power of attorney regarding the purposes outlined in the first
paragraph hereof dated as of a later date.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney
to be executed as of this 1st day of July, 2005.



/S/ JOHN M MCCORMACK

POWER OF ATTORNEY