Power of Attorney

Know all by these presents, that the undersigned hereby
constitutes and appoints Roger Jackson, General Counsel of
KMG Chemicals, Inc. (the "Company"), 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 of the Company, Forms
3, 4 and 5 in accordance with Section 16(a) of the
Securities Exchange Act of 1934, as amended, and the rules
thereunder;

(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 Form 3, 4 or 5 and timely
file such form with the United States Securities and
Exchange Commission and any stock exchange or similar
authority; and

(3)	take any other action or 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 each 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.

This Power of Attorney shall remain in full force and
effect until the undersigned is no longer required to file
Forms 3, 4 and 5 with respect to the undersigned's holdings
of and transaction in securities issued by the Company,
unless earlier revoked by the undersigned in a signed
writing delivered to the foregoing attorneys-in fact.

IN WITNESS WHEREOF, the undersigned has caused this Power
of Attorney to be executed as of the 29 day of May,
2008.


	/s/	Gerald G. Ermentrout
	Signature
	Gerald G. Ermentrout