The molecule is a fluorogenic cyanine dye in which N-(3-sulfopropyl)quinolinium is linked to a 1,3,3-trimethyldihydroindole via a propan-1-yl-3-ylidene chain to form a conjugated system. It has a role as a fluorescent dye. It is a quaternary ammonium salt, a cyanine dye and a zwitterion.
3-[4-[(E,3E)-3-(1,3,3-trimethylindol-2-ylidene)prop-1-enyl]quinolin-1-ium-1-yl]propane-1-sulfonate