Synonyms: Fluorescein,4',5'-dichloro-, disodium salt (8CI); Fluorescein, 4',5'-dichloro-, sodiumderiv., sodium salt (7CI); Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one,4',5'-dichloro-3',6'-dihydroxy-, disodium salt (9CI); C.I. 45365; C.I. SolventOrange 32; D and C Orange No. 8; Dichlorofluorescein sodium