IUPAC Name: disodium;8-anilino-5-[[4-[(5-sulfonatonaphthalen-1-yl)diazenyl]naphthalen-1-yl]diazenyl]naphthalene-1-sulfonate Synonyms: Acid Black 24, 3071-73-6, Sulfon Black S, Durol Black B, Fenazo Black SB, Cloth Black MB, Durol Black BA, Fast Black B, Milling Black BB, Sulfonine Black B, Sulphonol Black B, Cirene Black BRA, Durol Black 2B, Alphanol Black GV, Bucacid Black 2B, Neutral Black 3B, Sulphone Black BB, Sulfonine Black BB, Sulphonol Black BR, Alphanol Black BBN