The IUPAC name of Benzenesulfonic acid,4-[[4-[2-(4-hydroxy-2-methylphenyl)diazenyl]phenyl]amino]-3-nitro-, sodium salt(1:1) is sodium 4-[4-[(2E)-2-(2-methyl-4-oxocyclohexa-2,5-dien-1-ylidene)hydrazinyl]anilino]-3-nitrobenzenesulfonate. With the CAS registry number 70865-20-2, it is also named as 4-((4-((4-Hydroxy-2-methylphenyl)azo)phenyl)amino)-3-nitrobenzenesulfonic acid, sodium salt. The product's categories are Dyes; Weak Acid Dyes; Acid Dyes, and the other registry number is 61931-26-8. In addition, its molecular formula is C₁₉H₁₅N₄NaO₆S and molecular weight is 450.40037.

The other characteristics of Benzenesulfonic acid,4-[[4-[2-(4-hydroxy-2-methylphenyl)diazenyl]phenyl]amino]-3-nitro-, sodium salt(1:1) can be summarized as: (1)H-Bond Donor: 2; (2)H-Bond Acceptor: 9; (3)Rotatable Bond Count: 4; (4)Tautomer Count: 15; (5)Exact Mass: 450.061; (6)MonoIsotopic Mass: 450.061; (7)Topological Polar Surface Area: 165; (8)Heavy Atom Count: 31; (9)Complexity: 849; (10)EINECS: 274-950-1.

Production and Uses of Benzenesulfonic acid,4-[[4-[2-(4-hydroxy-2-methylphenyl)diazenyl]phenyl]amino]-3-nitro-, sodium salt(1:1): frist, you can diazotize 2-Nitro-4'-aminodiphenylamine-4-sulfoacid. And then please couple it with Meta-cresol. And you will get the product after salting out, filtration, drying. Moreover, this chemical is mainly used for dyeing of nylon.

People can use the following data to convert to the molecule structure.
(1)SMILES:[Na+].O=C/3/C=C\C(=N/Nc2ccc(Nc1ccc(cc1[N+]([O-])=O)S([O-])(=O)=O)cc2)\C(=C\3)C
(2)InChI:InChI=1/C19H16N4O6S.Na/c1-12-10-15(24)6-8-17(12)22-21-14-4-2-13(3-5-14)20-18-9-7-16(30(27,28)29)11-19(18)23(25)26;/h2-11,20-21H,1H3,(H,27,28,29);/q;+1/p-1/b22-17+
(3)InChIKey:QUMZGFZWXKDQFW-FYSBZMQTBK
(4)Std. InChI:InChI=1S/C19H16N4O6S.Na/c1-12-10-15(24)6-8-17(12)22-21-14-4-2-13(3-5-14)20-18-9-7-16(30(27,28)29)11-19(18)23(25)26;/h2-11,20-21H,1H3,(H,27,28,29);/q;+1/p-1/b22-17+
(5)Std. InChIKey:QUMZGFZWXKDQFW-GDHRODDYSA-M