Fast Orange G Chemical Name: Pyrazolone Orange, Permanent Orange G CAS No.: 3520-72-7 EU No.: 222-530-3 C.I. NO.: 21110 Chemical Formula: C32H24CL2N8O2 Molecular Weight: 623.48 Physical and Chemical Properties PH Value: 7 Density ( g/ cm3 ) : 1.5 Oil Absorption ( ml/ 100g) : 35 Light: 7-8 Heat ( ° C) : 180 Water: 5 Linseed Oil: 4 Acid: 5 Alkali: 4