trisodium 4-amino-5-hydroxy-3-[(2-hydroxyethylsulfonyl)-phenylazo]-6-[(E)-2-sulfonato-4-(vinylsulfonyl)phenylazo]naphthalene-2,7-disulfonate;
4-amino-5-hydroxy-3-[(2-hydroxyéthylsulfonyl)-phénylazo]-6-[(E)-2-sulfonato-4-(vinylsulfonyl)phénylazo]naphtalène-2,7-disulfonate de trisodium;