CAS Registry Number

CAS 1421-49-4 — 3,5-Di-tert-butyl-4-hydroxybenzoic acid

3,5-Di-tert-butyl-4-hydroxybenzoic acid is a hindered phenolic antioxidant widely used in plastics, rubber, and fuel additives to prevent oxidative degradation. It stabilizes polymers against heat, light, and oxygen, extending product lifespan. This white crystalline powder has a CAS number of 1421-49-4, molecular formula [(CH3)3C]2C6H2(OH)CO2H, and a molecular weight of 250.33 g/mol. Store at ambient conditions; marked with a warning signal word for moderate hazard. Molekula supplies 3,5-Di-tert-butyl-4-hydroxybenzoic acid from research to bulk quantities with full documentation and ISO 9001:2015 traceability.