Appearance White squamiform or crystal powder Purity 99.5 CAS NO. 85-44-9 Molecular formula C8H4O3 Melting point 131.6 Boiling point 295 Flash Point 151.7 Molten Color APHA 20Max Heat Stability Color APHA 50Max Free Acidity 0.5%Max Ash 0.05%Max