Synonyms: Pontamine Green S;C.I. Direct green 1; Erie Green WAC; Direct Dark Green; Erie Green WT; Dark Green EMBL; Amanil Green LT; Fenamin Green M;(6Z)-4-amino-5-oxo-3-[[4-[4-[2-(4-oxocyclohexa-2, 5-dien-1-ylidene)hydrazinyl]phenyl]phenyl]diazenyl]-6- (phenylhydrazinylidene)naphthalene-2,7-disulfonate;disodium;