1,2,3-Trimethyl-5-((1-methyl-1H-indol-3-yl)azo)-1H-pyrazolium methyl sulphate 1H-Pyrazolium, 1,2,3-trimethyl-5-((1-methyl-1H-indol-3-yl)azo)-, methyl sulfate 75284-34-3 EINECS 278-173-9