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Contact SupplierDirect Blue 14 Synonyms C.I. 23850; Trypan Blue; Niagara Blue 3B; Tetrasodium 3,3'-[(3,3'-dimethyl[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[5-amino-4-hydroxynaphthalene-2,7-disulphonate] Direct blue14(dye content 20%) C.I. 23850 Cas No. 72-57-1