Benzophenone-6

Title: Benzophenone-6
CAS Registry Number: 131-54-4
CAS Name: Bis(2-hydroxy-4-methoxyphenyl)methanone
Additional Names: 2,2¢-dihydroxy-4,4¢-dimethoxybenzophenone
Trademarks: Uvinul D49 (BASF)
Molecular Formula: C15H14O5
Molecular Weight: 274.27
Percent Composition: C 65.69%, H 5.14%, O 29.17%
Literature References: Prepn: Grover et al., J. Chem. Soc. 1955, 3982; Hardy, Forster, US 2773903 (1956 to Am. Cyanamid); Dayan, Roberts; Hahn, Stanley, US 2853522 and US 2853523 (both 1958 to Gen. Aniline); Hosler, Storfer, US 2928878 (1960 to Am. Cyanamid).
Properties: Crystals, mp 139-140°. uv max: 284, 340 nm (log e 4.12, 4.12).
Melting point: mp 139-140°
Absorption maximum: uv max: 284, 340 nm (log e 4.12, 4.12)
Use: As ultraviolet light absorber, esp in paints, plastics.
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