The molecule is an organic chloride salt and a xanthene dye. It has a role as a fluorochrome. It contains a QSY9 succinimidyl ester(1+).
4-[[9-[2-[4-(2,5-dioxopyrrolidin-1-yl)oxycarbonylpiperidin-1-yl]sulfonylphenyl]-6-[methyl-(4-sulfonatophenyl)azaniumylidene]xanthen-3-yl]-methylamino]benzenesulfonate;hydron;chloride