英文名称:C.I. Direct Black 9 (Van) (8Ci); Direct Black 9; C.I. Direct Black 9 (Van) (8Ci); C.I. Direct Black 9Disodium 8-Amino-5-[(E)-{4-[(2Z)-2-{7-[(E)-(2,4-Diaminophenyl)Diazenyl]-1-Oxo-3-Sulfonatonaphthalen-2(1H)-Ylidene}Hydrazinyl]Phenyl}Diazenyl]Naphthalene-2-Sulfonate; C.I. 31560; C.I. Direct Black 9Disodium 8-Amino-5-[(E)-{4-[(2Z)-2-{7-[(E)-(2,4-Diaminophenyl)Diazenyl]-1-Oxo-3-Sulfonatonaphthalen-2(1H)-Ylidene}Hydrazinyl]Phenyl}Diazenyl]Naphthalene-2-Sulfonate; C.I. 31565