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Fluorescein
C20H12O5 332.31
 Spiro[isobenzofuran-1(3H),9′-[9H]xanthen-3-one, 3′,6′-dihydroxy-.
 Fluorescein [2321-07-5]

» Fluorescein contains not less than 97.0 percent and not more than 102.0 percent of C20H12O5, calculated on the anhydrous basis.

USP REFERENCE STANDARDS FOR PURCHASE

USP Diacetylfluorescein RS
USP Fluorescein RS
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