68516-63-2 EINECS 271-168-2 Ethanaminium, N-(4-((3,4-bis(sulfomethyl)phenyl)(4-(diethylamino)phenyl)methylene)-2,5-cyclohexadien-1-ylidene)-N-ethyl-, inner salt, sodium salt Hydrogen (4-(4-(diethylamino)-3',4'-bis(sulphonatomethyl)benzhydrylidene)cyclohexa-2,5-dien-1-ylidene)diethylammonium, monosodium salt