The molecule is an organic trisodium salt having 2-(3-{4-tert-butyl-7-[ethyl(3-sulfonatopropyl)amino]chromenium-2-yl}prop-2-en-1-ylidene)-3-(3-carboxypropyl)-3-methyl-1-(3-sulfonatopropyl)indoline-5-sulfonate as the counterion. It has a role as a fluorochrome. It is an organic sodium salt and a DY-682(2-).
disodium;(2E)-2-[(E)-3-[4-tert-butyl-7-[ethyl(3-sulfonatopropyl)azaniumylidene]chromen-2-yl]prop-2-enylidene]-3-(3-carboxypropyl)-3-methyl-1-(3-sulfonatopropyl)indole-5-sulfonate