Diacetylfluorescein is used in fluorometric staining in the imaging of mammalian cells. Also used in the synthesis of nanocrystal biolabels with releasable fluorophores used in immunoassays.Synonyms:Fluorescein Diacetate; 3’,6’-Diacetylfluorescein; F 1303; FDA; Fluorescein 3’,6’-Diacetate; MFCD 5062; NSC 4726; NSC 667259CAS Number:596-09-8Molecular Formula:C₂₄H₁₆O₇Molecular Weight:416.38Appearance:Pale yellow crystalline powderPurity:≥99%Melting Point:201-203°CLoss on Drying:≤1%Solubility:Chloroform (Slightly), Methanol (Slightly, Heated, Sonicated)Storage:-20°C