3-((1,3-Dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)ethylidene)-9-ethyl-3H-carbazolium hydrogen sulphate 3H-Carbazolium, 3-((1,3-dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)ethylidene)-9-ethyl-, sulfate (1:1) 85283-94-9 EINECS 286-622-5