Azobenzene-4,4 -disulfonic acid

Synonyms 4-Ami noazobenzene-3,4 -disulfonic acid 4-Amino-3,4 -disulfoazobenzene 2-Amino-5-[(4-sulfophenyl) azo]-benzenesulfonic acid 4-(4-Amino-3-sulfophenylazo) benzenesulfonic acid Azobenzene-3,4 -disulfonic acid, 4-amino-Benzenesulfonic acid, 6-amino-3,4 -azodi- Benzenesulfonic acid, 2-amino-5-((4-sulfophenyl) azo)- Benzenesulfonic acid, 4-(4-amino-3-sulfophenylazo) Cl 13015 Food yellow 2... 

Azoamine red A. See 4 Methyl-2-nitroaniline Azoamine scarlet. See 2-Methoxy-5-nitroaniline Azobenzene, 4-amino-. See p-Phenylazoaniline Azobenzene-3,4 -disulfonic acid, 4-amino-. See Acid yellow 9... 

Synonyms Cl 16255 Coccine Coccin red Cochineal Red A Food red 7 7-Hydroxy-8-[(4-sulfo-1 -naphthalenyl) azo]-1,3-naphthalenedisulfonic acid, trisodium salt 1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-[(4-sulfo-1-naphthalenyl) azo]-, trisodium salt 1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-((4-sulfo-1-naphthyl) azo)-, trisodium salt New coccine Ponceau 4R 1 -(4-Sulfo-1 -naphthylazo)-2-naphthol-6,8-disulfonic acid, trisodium salt SX purple Trisodium 1-(1-naphthylazo)-2-hydroxynaphthalene-4, 6,8-trisulfonate Classification Monoazo color azobenzene Empirical C2oHi4N2Na30ioS3 Properties M.w. 607.51... 

CAS 5413-75-2 EINECS/ELINCS 226-502-1 Synonyms Acid red 73, disodium salt Cl 27290 7-Hydroxy-8-[[4-(phenylazo) phenyl] azo]-1,3-naphthalenedisulfonic acid, disodium salt 7-Hydroxy-8-(4-phenylazophenylazo) naphthalene-1,3-disulfonic acid, sodium salt 1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-((4-(phenylazo) phenyl) azo)-, disodium salt Classification Azobenzene diazo color Empirical C22HieN4Na207S2 Properties M.w. 558.48 Uses Dye for wool, silk, polyamide, resins, stains, and soaps colorant in hair dyes Manuf/Distrib. ABCR http //www.abcr.de] Aldrich http //www.sigma-aldrich.com] Anar Infl. http //www.anarchem.com] Dudley http //www.dudiey-chem.com] Fluka http //www.sigma-aldrich.com Acid red 87... 

CAS 6375-55-9 EINECS/ELINCS 228-940-9 Synonyms Acid yellow 42 disodium salt Acid yellow K (1,1 -Biphenyl)-2,2 -disulfonic acid, 4,4 -bis ((4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl) azo)-, disodium salt Cl 22910 Classification Azobenzene Empirical C32H24N8Na208S2 Properties M.w. 758.70 Toxicology Mutagenic data TSCA listed Hazardous Decomp. Prods. Heated to decomp., emits toxic vapors of NOx and SOx Uses Dye for wool, leather Manuf./Distrib. Aldrich http //www.sigma-aldrich.com, Anar Int l. http //www. anarchem. com Acid yellow 54... 

Sulfanilic acid is oxidized by periodate to azobenzene-4,4 -disulfonic acid in a reaction that involves nucleophilic attack of the aromatic amine group on the iodine, followed by loss of iodate and the formation of a nitrene, which then dimerizes. 

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