1099. Benzophenone-6

Nomenclature

CAS number: 131-54-4
Bis(2-hydroxy-4-methoxyphenyl)methanone; 2,2′-dihydroxy-4,4′-dimethoxybenzophenone; Uvinul D49 (BASF).
C15H14O5; mol wt 274.27.
C 65.69%, H 5.14%, O 29.17%.

Description and 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).

Chemical structure

Properties

Crystals, mp 139-140°. uv max: 284, 340 nm (log ε 4.12, 4.12).

Use

As ultraviolet light absorber, esp in paints, plastics.