Reactive Red 177

disodium hydrogen 5-acetamido-4-hydroxy-3-[(m-phosphonatophenyl)azo]naphthalene-2,7-disulphonate

2,7-Naphthalenedisulfonic acid, 5-(acetylamino)-4-hydroxy- 3-[(3-phosphonophenyl)azo]-, disodium salt