Syonyms Name: C.I. 30280; C.I. Direct green 1; C.I. Direct Green 1, disodium salt; disodium (3Z)-5-amino-4-oxo-6-[(E)-{4'-[2-(4-oxocyclohexa-2,5-dien-1-ylidene)hydrazinyl]biphenyl-4-yl}diazenyl]-3-(2-phenylhydrazinylidene)-3,4-dihydronaphthalene-2,7-disulfonate