... 123-31-9 4.white or off-white powdery crystal 5.25kgs (1) Photographic GradeMolecular Formual: 1,4-C6H4(OH ... (According to the international atomic weight of 1987)Specification: Content: 99% - 101%Usage: Generally for photograph, dye, pesticide rubber, ... to the international atomic weight of 1987)Specification: Content: ≥98.5% Usage: Generally for photograph, dye, pesticide rubber, chemical industry, ...