Syonyms Name: C.I. 30245; C.I. Direct Black 4; C.I. Direct Black 4 (VAN); C.I. Direct Black 4, disodium salt; C.I. Direct Black 4, disodium salt (8CI); 4-amino-3-[[4'-[(2,4-diamino-5-methylphenyl)azo][1,1'-biphenyl]-4-yl]azo]-5-hydroxy-6-(phenylazo)-2,7-Naphthalenedisu