Light Fastness: 6, Heat Resistance: 180, Oil Resistance: 4, Acid Resistance: 5, Alkali Resistance: 5 Trade Name: Benzidine Yellow GC.I. Number: Pigment Yellow 12CAS Number: 6358-85-6EU Number:228-787-8Chamical Family: Disazo2. Physical, Chemical and Fastness PropertiesMolecular Weight: 629.49Molecular Formula: C32H26 Cl2N6O4P.H. Value: 6.0-7.0Density: 1.5Oil Absorptionï: 40-50Light Fastness: ...