steariin

Stearin is a term that can refer to different substances, but most commonly it is used as a synonym for stearic acid, a saturated fatty acid. Stearic acid has the chemical formula CH3(CH2)16COOH. It is a waxy solid at room temperature and is found naturally in animal fats and vegetable oils. It is also produced industrially through the hydrolysis of fats and oils, followed by hydrogenation.

In a broader sense, stearin can also refer to triglycerides that are rich in stearic acid. These are esters of glycerol with three stearic acid molecules. This type of stearin is a major component of animal fats like tallow and cocoa butter.

The properties of stearin, particularly its solid nature and melting point, make it useful in various applications. It is commonly used in the production of candles, where its waxy consistency allows for a slow and steady burn. Stearin is also a common ingredient in soaps and cosmetics, acting as an emulsifier, thickener, and emollient. In the food industry, it can be used as a food additive, often labeled as E470, for its emulsifying and anti-caking properties. It is also used in the manufacture of lubricants and as a component in rubber processing. The specific properties and uses often depend on whether the term refers to stearic acid itself or a stearic acid-rich triglyceride.