Stearyl alcohol

Stearyl Alcohol

Chemical structure of stearyl alcohol

Stearyl alcohol, also known as octadecanol, is a fatty alcohol with the chemical formula C__H__O. It is a white, waxy solid with a faint odor and is commonly used in the cosmetic and pharmaceutical industries as an emollient, emulsifier, and thickening agent.

Chemical Properties

Stearyl alcohol is a long-chain saturated fatty alcohol derived from stearic acid. It is insoluble in water but soluble in organic solvents such as ethanol and ether. The compound has a melting point of approximately 60°C (140°F) and a boiling point of 210°C (410°F) at 15 mmHg.

Production

Stearyl alcohol is typically produced through the hydrogenation of stearic acid, which is obtained from animal fats and vegetable oils. The process involves the reduction of the carboxylic acid group to an alcohol group, resulting in the formation of stearyl alcohol.

Uses

Stearyl alcohol is widely used in the formulation of cosmetics and personal care products such as creams, lotions, shampoos, and conditioners. It acts as an emollient, providing a smooth and soft texture to the skin and hair. Additionally, it serves as an emulsifier, helping to stabilize oil-in-water emulsions.

In the pharmaceutical industry, stearyl alcohol is used as a tablet binder and coating agent. It is also employed in the production of ointments and creams to enhance their consistency and stability.

Safety and Environmental Impact

Stearyl alcohol is considered safe for use in cosmetic and pharmaceutical applications. It is non-toxic and non-irritating to the skin. However, as with all chemical substances, it should be handled with care to avoid unnecessary exposure.

From an environmental perspective, stearyl alcohol is biodegradable and does not pose significant risks to aquatic life. It is derived from renewable resources, making it a more sustainable option compared to petroleum-based products.

Related Pages

• Fatty alcohol
• Stearic acid
• Emollient
• Emulsifier
• Cosmetic chemistry