Synonyms: 3-[(1,3-dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)ethylidene]-9-ethyl-3H-carbazolium dihydrogen phosphate;3H-Carbazolium, 3-[(1,3-dihydro-1,3,3-trimethyl- 2H-indol-2-ylidene)ethylidene]-9-ethyl-, phosphate (1:1);3-((1,3-Dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)ethylidene)-9-ethyl-3H-carbazolium dihydrogen phosphate;Einecs 281-476-9