Rhodamine
9-(2-Carboxyphenyl)-3,6-bis(diethylamino)xanthylium(1+) is a food dye

9-(2-Carboxyphenyl)-3,6-bis(diethylamino)xanthylium(1+) belongs to the family of Xanthenes. These are polycyclic aromatic compounds containing a xanthene moiety, which consists of two benzene ring joined to each other by a pyran ring.