Title: Benzoic Anhydride
CAS Registry Number: 93-97-0
CAS Name: Benzoic acid anhydride
Molecular Formula: C14H10O3
Molecular Weight: 226.23
Percent Composition: C 74.33%, H 4.46%, O 21.22%
Line Formula: (C6H5CO)2O
Literature References: Prepd by heating benzoic acid with acetic anhydride in the presence of a trace of phosphoric acid: Clarke, Rahrs, Org. Synth. 3, 2 (1923); coll. vol. I (Wiley, New York, 2nd ed., 1941) p 91.
Properties: Orthorhombic bipyramidal prisms from benzene + petr ether. d415 1.1989. mp 42°. bp760 360°; bp200 299.1°; bp60 252.7°; bp40 239.8°; bp20 218°; bp10 198°; bp5 180°; bp1.0 143.8°. nD15 1.57665. Almost insol in water (0.01 g/l). Sol in alcohol, chloroform, acetone, ethyl acetate, benzene, toluene, xylene, ether, glacial acetic acid, acetic anhydride; moderately sol in petr ether; stable in water and in cold alkaline solns.
Melting point: mp 42°
Boiling point: bp760 360°; bp200 299.1°; bp60 252.7°; bp40 239.8°; bp20 218°; bp10 198°; bp5 180°; bp1.0 143.8°
Index of refraction: nD15 1.57665
Density: d415 1.1989
Use: In organic syntheses, as benzoylating agent in the manufacture of pharmaceuticals, dyes, and intermediates. |