英文名称:(3E)-5-Amino-6-[(E)-{4-[(E)-(2,4-Diaminophenyl)Diazenyl]Phenyl}Diazenyl]-3-(2-{4-[(E)-(2,4-Diaminophenyl)Diazenyl]Phenyl}Hydrazinylidene)-4-Oxo-3,4-Dihydronaphthalene-2,7-Disulfonic Acid; C.I. 35255; C.I.Direct Black 19; C.I. Direct Black 19, Disodium Salt; Disodium (3E)-5-Amino-6-[(E)-{4-[(E)-(2,4-Diaminophenyl)Diazenyl]Phenyl}Diazenyl]-3-(2-{4-[(E)-(2,4-Diaminophenyl)Diazenyl]Phenyl}Hydrazinylidene)-4-Oxo-3,4-Dihydronaphthalene-2,7-Disulfonate; (3E)-5-Amino-6-[(E)-{4-[(E)-(2,4-Diaminophenyl)Diazenyl]Phenyl}Diazenyl]-3-(2-{4-[(E)-(2,4-Diaminophenyl)Diazenyl]Phenyl}Hydrazinylidene)-4-Oxo-3,4-Dihydronaphthalene-2,7-Disulfonic Acid; Disodium (3E)-5-Amino-6-[(E)-{4-[(E)-(2,4-Diaminophenyl)Diazenyl]Phenyl}Diazenyl]-3-(2-{4-[(E)-(2,4-Diaminophenyl)Diazenyl]Phenyl}Hydrazinylidene)-4-Oxo-3,4-Dihydronaphthalene-2,7-Disulfonate; Direct Black 19; Direct Black G; C.I. Direct Black 19 (Van); C.I. Direct Black 19 (Van); C.I. Direct Black 19; Direct Fast Black G; C.I. Direct Black 19, Disodium Salt