Tetrasodium 4,5-Dihydroxy-3,6-Bis[(2-Sulfonatophenyl)Azo]Naphthalene-2,7-Disulfonate
[CAS# 164581-28-6]

Identification

• Classification: Analytical chemistry >> Standard >> Titration standard
• Name: Tetrasodium 4,5-Dihydroxy-3,6-Bis[(2-Sulfonatophenyl)Azo]Naphthalene-2,7-Disulfonate
• Synonyms: 2,7-Bis(2-sulfophenylazo)chromotropic acid tetrasodium salt; 3,6-Bis(2-sulfophenylazo)-4,5-dihydroxy-2,7-naphthalenedisulfonic acid tetrasodium salt; 3,6-bis(o-sulphophenylazo)-4,5-dihydroxynaphthalene-2,7-disulphonic acid
• Molecular Formula: C₂₂H₁₂N₄Na₄O₁₄S₄
• Molecular Weight: 776.57
• CAS Registry Number: 164581-28-6
• SMILES: [Na+].[Na+].[Na+].[Na+].[O-]S(=O)(=O)c4ccccc4/N=N/c1c(O)c3c(cc1S([O-])(=O)=O)cc(c(/N=N/c2ccccc2S([O-])(=O)=O)c3O)S([O-])(=O)=O
• InChI: 1S/C22H16N4O14S4.4Na/c27-21-18-11(9-16(43(35,36)37)19(21)25-23-12-5-1-3-7-14(12)41(29,30)31)10-17(44(38,39)40)20(22(18)28)26-24-13-6-2-4-8-15(13)42(32,33)34;;;;/h1-10,27-28H,(H,29,30,31)(H,32,33,34)(H,35,36,37)(H,38,39,40);;;;/q;4*+1/p-4/b25-23+,26-24+
• InChIKey: FCMRBZBGGXLKBC-KBJWUIGUSA-J

Properties

• Refractive index: (Cal.)