ITASCA, IL - Effective March 11, 2016, Fitz Chem Corp. now represents PQ Corp.’s Gasil® and Silcron® silica gel product line in an expanded territory to include Mississippi and Tennessee. The alignment between Fitz Chem and PQ Corp. is strengthened by the expansion of this relationship, and the companies believe customers will benefit from Fitz Chem’s product portfolio, technical expertise and high quality of service.