Chemical Composition: Color Index: Pigment Yellow 139 C.I.NO.: 56298 Chemical Formula: C16H9N5O6 CAS NO.: 36888-99-0 EU NO.: 253-256-2 Physical Properties: Physical Form : Yellow Powder Heat Resistance(o C): 250 Density (g/cm3): 1.8 Specific Surface(m2/g): 24 PH Value: 6.5-7.5 Oil Absorption(ml/100g): 46 Fastness Properties: Full Color Tint Color Dispersibility: Excellent Excellent Light Fastness: 7 7 Migration Resistance PVC 5 http://www.honorpigment.com