Acetic anhydride is an organic substance with the chemical formula of C4H6O3. It is a colorless transparent liquid with strong acetic acid odor, sour taste and hygroscopicity. It is soluble in chloroform and ether, slowly soluble in water to form acetic acid, and reacts with ethanol to form ethyl acetate. Flammable, corrosive and tear inducing.
Acetic anhydride is an important acetylation reagent. Acetic anhydride is used to manufacture cellulose acetate, acetic acid plastic and non combustible film; In the pharmaceutical industry, it is used to manufacture synthetic mycin, dysentery, Dibazol, caffeine, aspirin, sulfanilamide drugs, etc; In the dye industry, it is mainly used to produce disperse dark blue HCl, disperse scarlet s-swel, disperse yellow brown s-2rel, etc; In the spice industry, it is used to produce coumarin, bornyl acetate, musk of sunflower seed, cedaryl acetate, phenethyl acetate, geranyl acetate, etc; Acetyl peroxide, produced from acetic anhydride, is the initiator and bleaching agent for polymerization. Used for testing alcohols, aromatic primary amines and secondary amines; Used in organic synthesis, dyes, pharmaceutical industry and the manufacture of acetyl compounds. As a solvent and dehydrating agent, it is also an important acetylation reagent and polymer initiator. The final products are cellulose acetate and cellulose acetate plastic. It can also be used to manufacture heroin, 1-phenyl-2-acetone and n-acetyl-o-aminobenzoic acid. It is also a preparation for the production of methamphetamine, methamphetamine and methamphetamine. It is also the raw material of acetate starch.
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