Synonyms: 2,7-Naphthalenedisulfonicacid, 4-amino-5-hydroxy-3,6-bis[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-,tetrasodium salt (9CI);2,7-Naphthalenedisulfonic acid,4-amino-5-hydroxy-3,6-bis[[p-[(2-hydroxyethyl)sulfonyl]phenyl]azo]-,3,6-bis(hydrogen sulfate) (ester), tetrasodium salt (8CI);Basilen Black F-B;Basilen Black F-DF;C.I. Reactive Black 5;Celmazol Black B;Cibacron Marine W-B;Diamira Black B;Helaktyn Black B;Levafix Black E-B;Navictive Black B;Ostazin Black V-B;Primazine Black BN;Procion Black E-B;Reactive Black 4ST;Reactive Black B;Reactive Black KN-G 2RC;ReactiveBlack KNB;Reactive Black VB;Reactive Dark Blue B-BF;Remazol Black B 133;Remazol Black B-ID;Remazol Black GF;Remazol Black SB;Sumifix Black B;SynozolBlack B;Synozol Black B 150;Taifix Black B-T;