Phthalic anhydride
Product description
Phthalic anhydride is a colorless crystals, practically insoluble in water, moderately soluble in organic solvents. Shows the properties of aromatic compounds. With alcohols when heated in the presence of sulfuric acid, it forms complex mono - and diesters, with polyhydric alcohols - polyesters ( alkyd resins ). When chlorinated to the benzene ring, it forms tetrachlorophthalic acid anhydride - a monomer for producing self-extinguishing resins. Chlorination of the anhydride group, for example, by the action of phosphorus pentachloride PCl 5 , gives phthaloyl dichloride C 6 H 4 (COCl) 2
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Phthalic anhydride - 65864

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