<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>doc1.txt
<DESCRIPTION>POWER OF ATTORNEY (PUBLIC): POA - STM 9-1-17
<TEXT>
POWER OF ATTORNEY

	KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby
 constitutes and appoints each of Jennifer Ansbro Hale and Matthew
Michael Rice, signing singly, as the undersigned?s true and lawful
authorized representatives and attorneys-in-fact to:

(1)	execute for and on behalf of the undersigned, in the undersigned?s
capacity as an executive officer of Stepan Company (?the Company?),
Forms 3, 4 and 5, and any and all amendments thereto, in accordance with
Section 16 of the Securities Exchange Act of 1934, as amended (the ?1934
Act?), and the rules and regulations promulgated thereunder;

(2)	do and perform any and all acts for and on behalf of the undersigned
which may be necessary or desirable to complete the execution of any such
form or schedule and the timely filing of such form or schedule with the
United States Securities and Exchange Commission and any stock exchange or
stock market or other authority; and

(3)	take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorneys-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 attorneys-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 attorneys-in-
fact may approve in such attorneys-in-fact?s discretion.

	The undersigned hereby grants to each such attorney-in-fact full
power and authority to do and perform all 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 attorneys-in-fact, or such attorneys-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 attorneys-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 or any other
provision of the 1934 Act.

	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 transactions 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 this 1st day of September, 2017.



/s/ Sean T. Moriarty
Sean T. Moriarty
</TEXT>
</DOCUMENT>
