Brilliant green is an organic hydrogensulfate salt having 4-{[4-(diethylamino)phenyl](phenyl)methylidene}-N,N-diethylcyclohexa-2,5-dien-1-iminium as the counterion. It has a role as an antibacterial agent, an antiseptic drug, a fluorochrome, a poison, a histological dye and an environmental contaminant. It contains a brilliant green cation.
