IUPAC Name: sodium 4-[3-[2-methyl-4-(4-methylphenyl)sulfonyloxyphenyl]diazenylanilino]-3-nitrobenzenesulfonate 
Empirical Formula: C₂₆H₂₁N₄NaO₈S₂
Molecular Weight: 604.5867
EINECS: 235-406-9
Structure of Benzenesulfonic acid,4-[[4-[2-[2-methyl-4-[[(4-methylphenyl)sulfonyl]oxy]phenyl]diazenyl]phenyl]amino]-3-nitro-,sodium salt (1:1) (CAS NO.12220-06-3):

Product Categories: Dyes and Pigments;Organics 
Synonyms of Benzenesulfonic acid,4-[[4-[2-[2-methyl-4-[[(4-methylphenyl)sulfonyl]oxy]phenyl]diazenyl]phenyl]amino]-3-nitro-,sodium salt (1:1) (CAS NO.12220-06-3): C.I. Acid Orange 67 ; sodium 4-[4-[[2-methyl-4-[[(p-tolyl)sulphonyl]oxy]phenyl]azo]anilino]-3-nitrobenzenesulphonate;AcidOrange3R ; Benzenesulfonic acid, 4-4-2-methyl-4-(4-methylphenyl)sulfonyloxyphenylazophenylamino-3-nitro-, monosodium salt ; Acid orange 67 (C.I. 14172) 
Canonical SMILES: CC1=CC=C(C=C1)S(=O)(=O)OC2=CC(=C(C=C2)N=NC3=CC(=CC=C3)NC4=C(C=C(C=C4)S(=O)(=O)[O-])[N+](=O)[O-])C.[Na+]
InChI: InChI=1S/C26H22N4O8S2.Na/c1-17-6-9-22(10-7-17)40(36,37)38-21-8-12-24(18(2)14-21)29-28-20-5-3-4-19(15-20)27-25-13-11-23(39(33,34)35)16-26(25)30(31)32;/h3-16,27H,1-2H3,(H,33,34,35);/q;+1/p-1
InChIKey: GNFJBURFXWYRQN-UHFFFAOYSA-M