Synonyms: Ammonium,[9-(2-carboxy-4-isothiocyanatophenyl)-6-(dimethylamino)-3H-xanthen-3-ylidene]dimethyl-,chloride (8CI); Methanaminium,N-[9-(2-carboxy-4-isothiocyanatophenyl)-6-(dimethylamino)-3H-xanthen-3-ylidene]-N-methyl-,chloride; Xanthylium,9-(2-carboxy-4-isothiocyanatophenyl)-3,6-bis(dimethylamino)-, chloride (9CI);[9-(2-Carboxy-4-isothiocyanatophenyl)-6-(dimethylamino)-3H-xanthen-3-ylidene]dimethylammoniumchloride (6CI,7CI); Rhodamine B, tetramethyl-, isothiocyanate, isomer G