C.I.21725

Acid Alizarine Black

C.I.Mordant Black 25

disodium 6-hydroxy-5-[[2-hydroxy-3-[(2-hydroxynaphthyl)azo]-5-sulphonatophenyl]azo]naphthalene-2-sulphonate

6-Hydroxy-5-[[2-hydroxy-3-[(2-hydroxy-1-naphtyl)azo]-5-sulfophenyl]azo]-2-naphthalenesulfonic acid disodium salt

2-Naphthalenesulfonic acid, 6-hydroxy-5-[[2-hydroxy-3- [(2-hydroxy-1-naphthalenyl)azo]-5-sulfophenyl]azo ]-, disodium salt