C.I.20350

C.I.Acid Black 17

4-Amino-5-hydroxy-6-(1-naphtylazo)-3-[(4-sulfophenyl)azo]-1-naphthalenesulfonic acid disodium salt

(6Z)-4-amino-6-(naphthalen-1-ylhydrazinylidene)-5-oxo-3-(4-sulfophenyl)diazenyl-naphthalene-1-sulfonic acid