Triacetin

CAS 102-76-1

Triacetin (CAS 102-76-1) shows how molecular structure determines chemical role. Triacetin (CAS 102-76-1), also called glyceryl triacetate, is the triester formed when all three hydroxyl groups of glycerol are acetylated. PubChem gives the formula C9H14O6 and molecular weight 218.20. The transformation converts highly hydrogen-bonding glycerol into a neutral, mobile ester liquid with useful solvent and plasticizing properties. Triacetin has a remarkably broad practical history. FDA food records list it as a flavoring adjunct, formulation aid, humectant, solvent or vehicle, and other technical functions, and it is affirmed for food use under specified regulations. It is also used as a pharmaceutical excipient and as a plasticizer in polymer and cellulose applications. Its versatility comes from a simple structural balance: three ester groups retain polarity, while acetylation suppresses.