Chemical Composition: Color Index: Pigment Red 185 C.I.NO.: 12516 Chemical Formula: C27H24N6O6S CAS NO.: 51920-12-8, 61951-98-2 EU NO.: 257-515-0, 263-353-1 Physical Properties: Physical Form : Red Powder Heat Resistance(o C): 250 Density (g/cm3): 1.45 Specific Surface(㎡/g): 45 PH Value: 6.0-8.0 Oil Absorption(ml/100g): 40-50 http://www.honorpigment.com