4-Methylanilin-2,5-disulfonsaeure, p-Toluidine-2,5-disulfonic acid (NH2=1), 4-methylaniline-2,5-disulphonic acid, 4-amino-toluene-2,5-disulfonic acid, 4-TOLUDINE-2,5-DISULFONIC ACID, 4-methylaniline-2,5-disulfonic acid, 4-Amino-toluol-2,5-disulfonsaeure, p-Toluidine-2,5-disulfonic acid