UKITED STATES ENVIRONMENTAL PROTECTION ACEtiC

Ms. Elizabeth TannehillMason Chemical Company721 W. Algonquin RoadArlington Heights, IL 60005 MAR 28 2012

Subject: Maquat® FL-1 and Maquat® FL-2EPA Registration No.: 10324-137 and!Application Dated: January 20, 2012EPA Receipt Date: January 26, 2012

Dear Ms. Tannehill,

The following amendment, submitted in connection with registration under the FederalInsecticide, Fungicide, and Rodenticide Act (FIFRA), section 3 ( C ) (7) (A) as amended, isacceptable with comments.

• Addition of Spanish and English statements• Correction of reviewer note• Addition of container explanation in Storage and Disposal section• Addition of icons

Conditions

• For Swimming Pool use And Decorative Fountains and Pools in nonrefillable containersup to and including 5 gallons revise language to read; "Do not reuse empty container.Triple rinse (or equivalent). Wrap and discard in trash (or recycle)".

General Comments

A stamped copy of the accepted labeling is enclosed. Submit one (1) copy of your finalprinted labeling before distributing or selling the product bearing the revised labeling.Should you have any questions concerning this letter, please contact Emilia Oiguenblik at (703)347-0199 or Velma Noble at (703) 308-6233.

Velma NomeProduct Manager (31)Regulatory Management Branch IA

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