XC8171 Permanent Pink ( Pigment Red 245) Chemical Name: Naphthol Red 245 CAS No.: 68016-05-7 EU No.: 268-171-6 C.I. NO.: 12317 Chemical Formula: C25H20N4O4 Molecular Weight: 440.45 Physical and Chemical Properties PH Value : 7 Density ( g/ cm3 ) : 1.5 Oil Absorption ( ml/ 100g) : 40 Light : 8 Heat ( ° C) : 200 Water : 5 Linseed Oil : 5 Acid : 5 Alkali : 5