Molecular formula: C6H6N2O2 Molecular weight: 138.13 CAS#: 100-01-6 Enterprise standard Physicochemical index Dry product Wet product Appearance Yellow brown crystal Yellow brown crystal Purity: 99.5%min 90%min Water content 0.5%max 10%max Analytical method: Gas chromatography purity Packing: 25kg or 50kg/ woven bag.