3-[2,5-Dichloro-4-(2-sodiosulfoethylaminosulfonyl)phenylazo]-2-methyl-1H-indole

N-(2-Sulfoethyl)-2,5-dichloro-4-[3-(2-methyl-1H-indolyl)azo] benzenesulfonamide, sodium salt

sodium 2-[[[2,5-dichloro-4-[(2-methyl-1H-indol-3-yl)azo]phenyl]sulphonyl]amino]ethanesulphonate

Ethanesulfonic acid, 2-2,5-dichloro-4-(2-methyl-1H-indol-3-yl)azophenylsulfonylamino-, monosodium salt