Ascorbyl stearate is a fat-soluble form of Vitamin C produced from ascorbic acid and stearic acid. It is used primarily as an antioxidant in commercial food production. Ascorbyl stearate is particularly poular in margarine where it prevents fats from becoming rancid.
Ascorbyl stearate is evaluated as safe, and considered acceptable for use across food agencies.
E305, Vitamin C stearate