Dye reagent PE1002.100

laboratory

Sodium fluorescein is an organic fluorescent dye belonging to the xanthene derivative family, widely used as a reagent in laboratory, diagnostic, and analytical fields. The compound is identified by CAS number 518-47-8, has the molecular formula C20H10O5Na2 and a molecular weight of 376.28. The substance is also known by the synonyms C.I. Acid Yellow 73 and D&C Yellow No. 8. In commercial form, it appears as a dark red-orange or reddish-brown powder, characterized by intense green fluorescence when dissolved in water.
Pro-Eko Srl supplies this raw material as part of its catalog of chemical reagents and technical dyes, with documentary management and batch traceability. The product is used as a fluorescent tracer and as a water-soluble dye in various laboratory and industrial applications. The technical and analytical data reported in the chemical-physical properties section are derived from the manufacturer's technical documentation and constitute the reference for verifying quality specifications.
Chemical data and identification :
Chemical name: sodium fluorescein
CAS number: 518-47-8
Molecular formula: C20H10O5Na2
Molecular weight: 376.28
Color Index: C.I. 45350
Synonyms: C.I. Acid Yellow 73, D&C Yellow No. 8, fluorescein sodium
Commercial form: powder
Chemical-physical properties :
Appearance: dark red-orange or reddish-brown powder
Assay: 90.0 – 102.0 %
Loss on drying (135°C, 1h): max. 17 %
Solubility in water (1 mg/ml): yellow solution with green fluorescence
Maximum wavelength: 491 nm in water