Stearic

Stearic acid is a saturated fatty acid with an 18-carbon chain. The IUPAC name for stearic acid is octadecanoic acid. It is a waxy solid and its chemical formula is C₁₈H₃₆O₂. Its name comes from the Greek word "στέαρ" (stéar), which means tallow. The salts and esters of stearic acid are called stearates.

Properties

Stearic acid is a strong acid with a pKa of 4.75. It is typically found in the form of stearates, which are salts and esters of stearic acid. Stearic acid is a waxy solid at room temperature, and its melting point is 69.3 degrees Celsius.

Sources

Stearic acid is found in various animal and plant fats, and is a major component of cocoa butter and shea butter. It is also found in beef, coconut oil, sunflower oil, and palm oil.

Uses

Stearic acid is used in the production of detergents, soaps, and cosmetics such as shampoos and shaving creams. It is also used in the manufacture of plasticizers, lubricants, and candles. In food production, it is used as a hardening agent.

Health effects

Ingesting large amounts of stearic acid may lead to the formation of cholesterol plaques in the arteries, which can increase the risk of heart disease. However, stearic acid is generally considered safe for consumption in moderate amounts.

See also

• Fatty acid
• Saturated fat
• Unsaturated fat