الوصف

Acetic Anhydride

Other name: Ethanoyl ethanoate, Acetic acid anhydride, Acetyl acetate

CAS NO.:*******7

Molecular Formula: C4H6O3

Molecular weight:**2.*9 g mol−1

Density: 1.**2 g cm−3, liquid

Melting point: −*3.1 °C, **0 K, ***0 °F

Boiling point: **9.8 °C, **3 K, **4 °F

Appearance: colorless liquid

Usage: As indicated by its organic chemistry, Ac2O is mainly used for acetylations leading to commercially significant materials. Its largest application is for the conversion of cellulose to cullulose acetate, which is a component of photographic film and other coated materials. Similarly it is used in the production of aspirin (acetylsalicylic acid), which is prepared by the acetylation of salicylic acid. It is also used as a wood preservative via autoclave impregnation to make a longer lasting timber.In starch industry, acetic anydride is a common acetylation compound, used for the production of modified starches (E***4, E***0, E***2)