Stearyl acetate

Stearyl acetate (CAS 822-23-1, EC 212-493-1) is a long-chain fatty acid ester derived from stearyl alcohol and acetic acid, also known commercially as octadecyl acetate and NSC 5546. It carries no assigned E-code and is classified within the oils, fats, and waxes chemical category.

In personal care formulations, stearyl acetate functions as an emollient and carrier, improving spreadability and skin feel by forming a lightweight occlusive layer. In lubricant and metalworking applications, its long saturated carbon chain reduces friction between metal surfaces, providing boundary lubrication under moderate load conditions.

Stearyl acetate is supplied as a solid and is subject to REACH registration requirements for EU market entry. Procurement teams should confirm grade specifications, including purity and acid value, against application requirements. Standard industrial packaging formats apply; suppliers should be consulted directly for available lot sizes and documentation.