Synonyms: 2,7-Naphthalenedisulfonicacid,6-amino-4-hydroxy-3-[[7-sulfo-4-[(4-sulfophenyl)azo]-1-naphthalenyl]azo]-,tetrasodium salt (9CI); 2,7-Naphthalenedisulfonic acid,6-amino-4-hydroxy-3-[[7-sulfo-4-[(p-sulfophenyl)azo]-1-naphthyl]azo]-,tetrasodium salt (7CI); C.I. Food Black 2, tetrasodium salt (8CI); Black 7984;Black No. 2; C Black 7; C.I. 27755; C.I. Food Black 2; Daiwa Black FS 20; E152; E 152 (dye); Food Black 2