1: 2,2',4,4'-Tetrahydroxybenzophenone 2: competitive price 3:excellent quality Product informationPurity: 98% minPackaging: 25 ... and inhalation. Use with adequate ventilation. Wash clothing before reuse. 2,2',4,4'-Tetrahydroxybenzophenone(UV-2), Cas No.:131-55-5