Ascorbyl stearate

A chemical compound used as an antioxidant in food and cosmetics

Ascorbyl Stearate

Chemical structure of Ascorbyl Stearate

Ascorbyl stearate is an ester formed from ascorbic acid (vitamin C) and stearic acid. It is commonly used as an antioxidant in food and cosmetic products. Ascorbyl stearate is known for its ability to stabilize oils and fats, preventing them from becoming rancid.

Chemical Properties

Ascorbyl stearate is a white to off-white powder that is soluble in oils and fats but insoluble in water. The compound is characterized by its chemical structure, which combines the hydrophilic properties of ascorbic acid with the lipophilic properties of stearic acid. This dual nature allows it to function effectively as an emulsifier and antioxidant.

Uses

In Food

In the food industry, ascorbyl stearate is used as an additive to preserve the freshness and extend the shelf life of products. It is often found in baked goods, margarine, and other fat-containing foods. Its role as an antioxidant helps to prevent the oxidation of fats, which can lead to spoilage and off-flavors.

In Cosmetics

In cosmetics, ascorbyl stearate is valued for its skin-conditioning properties. It is used in formulations for lotions, creams, and other skincare products. The compound helps to stabilize the product and protect the skin from oxidative stress.

Mechanism of Action

As an antioxidant, ascorbyl stearate works by donating electrons to free radicals, neutralizing them and preventing oxidative damage. This action helps to maintain the integrity of cell membranes and other structures in both food and skin products.

Safety and Regulation

Ascorbyl stearate is generally recognized as safe (GRAS) by food safety authorities. It is approved for use in various concentrations depending on the application. In cosmetics, it is considered non-irritating and suitable for use in a wide range of products.

Related Compounds

Ascorbyl stearate is part of a family of ascorbyl esters, which include ascorbyl palmitate and ascorbyl oleate. These compounds share similar properties and uses, particularly in their roles as antioxidants and stabilizers.

Related pages

• Ascorbic acid
• Stearic acid
• Antioxidant
• Emulsifier