(9-(2-Carboxyethyl)-6-(dimethylamino)-3H-xanthenylidene)dimethylammonium chloride 2509-06-0 Methanaminium, N-(9-(2-carboxyethyl)-6-(dimethylamino)-3H-xanthen-3-ylidene)-N-methyl-, Cl Rhodamine S Extra Xanthylium, 9-(2-carboxyethyl)-3,6-bis(dimethylamino)-, chloride