Eosin Y disodium salt Synonym: Acid Red 87, Bromo acid J. TS, XL, or XX, Bromofluorescein, Bronze Bromo ES, Eosin yellowish, 2′,4′,5′,7′-Tetrabromofluorescein disodium salt CAS Number: 17372-87-1 Empirical Formula (Hill Notation): C20H6Br4Na2O5 Molecular Weight: 691.85 Colour Index Number: 45380 用途：生物染色剂，吸附指示剂，滴定溴，碘，氟等离子。