3,3'-Thiodipropionic acid

3,3'-Thiodipropionic acid (CAS 111-17-1) is a sulfur-containing organic acid commercially known under trade names including Tyox A and RARECHEM AL BO 0314. It carries no assigned E-code and is classified under HS code 29309070. The compound is recognised across food, cosmetic, pharmaceutical, and polymer industries.

In polymer and plastics applications, it functions as a synergistic antioxidant by decomposing hydroperoxides before they initiate chain degradation, extending the service life of polyolefins and other oxidation-sensitive materials. In food and personal care formulations, it acts as a reducing agent and antioxidant, protecting lipid-containing systems from oxidative rancidity.

This material is supplied as a fine crystalline powder meeting food-grade and industrial-grade specifications. It falls under REACH regulation and is available from European stock with documentation supporting FCC compliance for food applications. Standard packaging formats include fibre drums and multi-wall bags.