IUPAC Name: disodium;4-amino-5-hydroxy-3-[(4-nitrophenyl)diazenyl]-6-phenyldiazenylnaphthalene-2,7-disulfonate Synonyms: ACID BLACK 1, 1064-48-8, Naphthol Blue Black, Amido Black 10B, Acid black 2, 8005-03-6, Buffalo Black NBR, C.I. Acid Black 1, NIGROSINE, Amidoschwarz, Amido black, C.I. Acid Black 1, disodium salt, Acidal Black 10B, Eriosin Blue Black B, Naphthol Blue Black B, Acidal Navy Blue 3BR, Acid Blue Black, Acid Blue-Black, C.I. 20470, Sandopel Blue P