Naphthol Blue Black

1064-48-8

2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-[2-(4-nitrophenyl)diazenyl]-6-(2-phenyldiazenyl)-, sodium salt; 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-[(4-nitrophenyl)azo]-6-(phenylazo)-, disodium salt; Acid Black 1; sodium 4-amino-5-hydroxy-3-((4-nitrophenyl)diazenyl)-6-(phenyldiazenyl)naphthalene-2,7-disulfonate;