3303. Dioxybenzone

Nomenclature

CAS number: 131-53-3
(2-Hydroxy-4-methoxyphenyl)(2-hydroxyphenyl)methanone; 2,2′-dihydroxy-4-methoxybenzophenone; 4-methoxy-2,2′-dihydroxybenzophenone; benzophenone-8; Cyasorb UV 24 (obsolete) (Am. Cyanamid); Spectra-Sorb UV 24 (Am. Cyanamid).
C14H12O4; mol wt 244.24.
C 68.85%, H 4.95%, O 26.20%.

Description and references

Prepn: Hardy et al., US 2853521 (1958 to Am. Cyanamid).

Chemical structure

Properties

Yellow powder, mp 68°. Soly in g/100 ml at 25°: ethanol 21.8; isopropanol 17; propylene glycol 6.2; ethylene glycol 3.0; n-hexane 1.5.

Therapeutic Category

Ultraviolet screen.

Keywords

Ultraviolet Screen