International Sulphur, Inc. has served the rubber trade since 1950, grinding, blending, classifying, flaking, and emulsifying recovered sulphur to specification at Mount Pleasant, Texas, on Interstate 30 and the railroad. It joined the GGS family in 1997 and has been ISO 9001 certified since 1994.

International Sulphur was founded as International Chemicals in 1950 by Robert H. Acock, with its first plant at 12 Daly Place in Houston, near the Frasch sulphur mining industry of that time. In 1965 the company built Sulphur Sales, Inc. in Middle Point, Ohio to serve that state's tire and rubber industry.
A new plant went up at Mount Pleasant, Texas in 1969, chosen for the railroad, the new Interstate 30, and an abundance of nearby recovered sulphur. Manufacturing consolidated there, the company was renamed International Sulfur Inc. in 1990, and majority ownership passed to Georgia Gulf Sulfur in June 1997.
Representative grades. Every lot ships with a certificate of analysis against the published spec.
From Mount Pleasant, sulfur moves by rail and truck to rubber, industrial, and agricultural customers across the central United States and export markets, 125 miles east of Dallas.
ONE SALES TEAM, ONE SPEC DISCIPLINE, ONE CERTIFICATE OF ANALYSIS PER LOT.