Synonyms: tetrasodium; Levafix Black E-B;Diamira Black B; Sumifix Black B; Primazin Black BN;(6E)-4-amino-5-oxo-3-[[4-(2-sulfonatooxyethylsulfonyl) phenyl]diazenyl]-6-[[4-(2-sulfonatooxyethylsulfonyl)phenyl] hydrazinylidene]naphthalene-2,7-disulfonate; Cavalite Black B; Remazol Black GF; Celmazol Black B;