Patent Blue VF,indicator grade, sodium,4-[[4-(diethylamino)phenyl]-(4-diethylazaniumylidenecyclohexa-2,5-dien-1-ylidene)methyl]benzene-1,3-disulfonate, Sulphan Blue
Hydrogen 5,6-dichloro-2-[3-[2H-benzimidazol-2-ylidene-5,6-dichloro-1-ethyl-1,3-dihydro-3-(4-sulphonatobutyl)]propen-1-yl]-1-ethyl-3-(4-sulphonatobutyl)-1H-benzimidazolium, sodium salt