131-55-5 2,2',4,4'-Tetrahydroxy-benzophenone 2,2',4,4'-Tetrahydroxybenzophenone 2,4,2',4'-Tetrahydroxybenzophenone 4-08-00-03505 (Beilstein Handbook Reference) 53236-95-6 BENZOPHENONE, 2,2',4,4'-TETRAHYDROXY- BRN 1914746 Benzophenone-2 Bis(2,4-dihydroxyphenyl)methanone EINECS 205-028-9 Methanone, bis(2,4-dihydroxyphenyl)- NSC 38556 Uvinol D-50 Uvinul D-50