CAS No.: 108-46-3 Molecular Weight: 110. 11 Molecular Formula: C6H6O2 Specifications Appearance: white to grayish-white flake Assay: 99% min. HPLC purity: 99. 8% min. Quinol: 0. 05% max. Catechol: 0. 05% max. Phenol: 0 Melting point: 109 centigrade min. Packing: 25kgs per bag.