Ascorbyl stearate

Ascorbyl stearate is a derivative of ascorbic acid, commonly known as vitamin C, and stearic acid, a saturated long-chain fatty acid. It is used as an antioxidant in food and cosmetics due to its ability to prevent the oxidation of fats and oils, thereby extending their shelf life.

Chemical Structure

Ascorbyl stearate is a compound formed by the esterification of ascorbic acid and stearic acid. The ester linkage is formed between the carboxyl group of stearic acid and the hydroxyl group of ascorbic acid. This results in a molecule that has the antioxidant properties of ascorbic acid and the lipophilic properties of stearic acid.

Uses

Ascorbyl stearate is primarily used as an antioxidant in food and cosmetics. In food, it prevents the oxidation of fats and oils, which can lead to rancidity. This extends the shelf life of food products and maintains their quality. In cosmetics, ascorbyl stearate is used to prevent the oxidation of oils and fats in the product, which can cause the product to spoil or change color. It is also used to improve the texture and feel of cosmetic products due to its lipophilic properties.

Safety

Ascorbyl stearate is generally recognized as safe (GRAS) by the Food and Drug Administration (FDA). However, like all additives, it should be used in moderation. Some people may experience allergic reactions to ascorbyl stearate, although this is rare.

See Also

• Ascorbic acid
• Stearic acid
• Antioxidant
• Food preservation
• Cosmetics