Fluorescein

Fluorescein Impurities & Reference Standards

Used throughout the pharmaceutical sector, Fluorescein is an active pharmaceutical ingredient (API) integral to the formulation of medicines and finished dosage forms. Fluorescein is registered under CAS Number 2321-07-5. With molecular formula C20H12O5 and molecular weight 332.3 g/mol, its physicochemical identity is well characterized. These Fluorescein reference impurities are critical for pharmaceutical quality control, method validation, and regulatory filings aligned with ICH, USP, BP, and EP standards. Each batch of Fluorescein reference standard is accompanied by a Certificate of Analysis (CoA), HPLC purity data, and spectroscopic (NMR/MS/IR) characterization for use in pharmaceutical laboratories worldwide.