C.I.20480

C.I.Acid Black 41

trisodium 4-amino-5-hydroxy-3-[(4-nitrophenyl)azo]-6-[(4-sulphonatophenyl)azo]naphthalene-2,7-disulphonate

4-Amino-5-hydroxy-3-[(4-nitrophenyl)azo]-6-[(4-sulfophenyl)azo]-2,7-naphthalenedisulfonic acid trisodium salt