p-Benzoquinone (Quinone), 99+%, 500g For Research & Development Not for drug, clinical use in humans, for food or food additive use Specifications: Appearance (Color) Yellow to green-gold to green Appearance (Form) Powder Melting Point: 112-116 °C Assay (GC): 99+% Insolubles in Dichloromethane: <0.45% Moisture: <0.5% Residue on Ignition: <0.05% CAS: 106-51-4 FORMULA: C6H4(=O)2