Triacetin

Triacetin (also known as glyceryl triacetate) is a colorless, odorless, viscous liquid that is used in a variety of industrial and consumer applications. It is a triester of glycerol and acetic acid, and is the simplest example of a triglyceride.

Chemical Properties

Triacetin is a clear, colorless and hygroscopic liquid. It has a high boiling point and a low melting point, which makes it a liquid at room temperature. It is soluble in many organic solvents, but only slightly soluble in water.

Production

Triacetin is produced by the acetylation of glycerol. This process involves the reaction of glycerol with acetic acid in the presence of a strong acid catalyst. The reaction is highly exothermic and produces water as a byproduct.

Applications

Triacetin has a wide range of uses due to its properties as a solvent and plasticizer. It is used in the production of cellulose acetate, which is used in the manufacture of cigarette filters. It is also used as a food additive, where it serves as a humectant, solvent and preservative. In the pharmaceutical industry, it is used as a plasticizer in the production of gelatin capsules. It is also used in the production of perfumes and cosmetics due to its ability to carry and fix fragrances.

Safety

Triacetin is generally considered safe for use in food and pharmaceutical applications. However, it can cause irritation to the eyes and skin, and prolonged exposure can lead to respiratory problems. It is not considered to be a carcinogen or a reproductive toxin.

Environmental Impact

Triacetin is not considered to be a significant environmental hazard. It is readily biodegradable and is not expected to bioaccumulate in the environment. However, it can contribute to air pollution if it is not properly managed during production and use.

See Also

• Glycerol
• Acetic acid
• Cellulose acetate
• Food additive
• Plasticizer