CAS Registry Number

CAS 1138-52-9 — 3,5-Di-tert-butylphenol

3,5-Di-tert-butylphenol is a synthetic antioxidant and polymerization inhibitor, widely used in plastics, rubbers, and fuels to prevent oxidative degradation. It appears as a white crystalline solid with a faint phenolic odor. CAS 1138-52-9, molecular formula [(CH3)3C]2C6H3OH, molecular weight 206.32 g/mol. Stored at ambient conditions, it carries a **Danger** signal word due to its irritant and corrosive properties. Molekula supplies 3,5-Di-tert-butylphenol from research to bulk quantities with full documentation and ISO 9001:2015 traceability.