Acetic anhydride is an organic compound with the chemical formula C4H6O3. It is a colorless, transparent liquid with a strong acetic odor and a sour taste. It is hygroscopic, soluble in chloroform and...

Acetic anhydride is an organic compound with the chemical formula C4H6O3. It is a colorless, transparent liquid with a strong acetic odor and a sour taste. It is hygroscopic, soluble in chloroform and ether, and slowly dissolves in water to form acetic acid. It reacts with ethanol to form ethyl acetate. Acetic anhydride is flammable, corrosive, and lachrymatory. Acetic anhydride is an important acetylation reagent used in the production of cellulose acetate, acetic plastics, and non-flammable film. In the pharmaceutical industry, it is used in the production of synthetic medicines like streptomycin, furosemide, caffeine, aspirin, and sulfonamide drugs. In the dye industry, it is mainly used to produce Disperse Blue HCL, Disperse Red S-SWEL, and Disperse Yellow-Brown S-2REL, among others. In the fragrance industry, it is used to produce coumarin, camphor acetate, musk acetate, cedarwood acetate, phenylethyl acetate, and geranyl acetate. Peracetic acid, derived from acetic anhydride, is used as a polymerization initiator and bleach. It is used to test alcohols, aromatic primary amines, and secondary amines. It also serves as a solvent, dehydrating agent, and is an important acetylation reagent and polymer initiator. Final products include cellulose acetate and acetic fiber plastics. It is also used to make heroin, 1-phenyl-2-propanone, N-acetyl-ortho-aminobenzoic acid, as well as sleep aids, methylamphetamine, and other substances.

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