F2456

Fluorescein (free acid)

Dye content 95%, Powder

• Formule empirique (notation de Hill): C₂₀H₁₂O₅
• Numéro CAS: 2321-07-5
• Poids moléculaire : 332.31
• Numéro C.I. (Colour Index): 45350:1
• Numéro Beilstein : 94324
• Numéro CE : 219-031-8
• Numéro MDL: MFCD00005050
• Code UNSPSC : 12171500
• ID de substance PubChem : 24894822
• Nomenclature NACRES : NA.47

Propriétés

• product name: Fluorescein (free acid), Dye content 95 %
• Forme: powder
• Niveau de qualité: 200
• Composition: Dye content, 95%
• Technique(s): titration: suitable
• Couleur: orange to red-brown
• Pf: 320 °C (lit.)
• λmax: 496 nm
• ε (coefficient d'extinction): ≥12000 at 282-286 nm; ≥39000 at 236-240 nm; ≥70000 at 488-492 nm
• Application(s): diagnostic assay manufacturing; hematology; histology
• Température de stockage: room temp
• Chaîne SMILES: Oc1ccc2c(Oc3cc(O)ccc3C24OC(=O)c5ccccc45)c1
• InChI: 1S/C20H12O5/c21-11-5-7-15-17(9-11)24-18-10-12(22)6-8-16(18)20(15)14-4-2-1-3-13(14)19(23)25-20/h1-10,21-22H
• Clé InChI: GNBHRKFJIUUOQI-UHFFFAOYSA-N

Description

Description générale

Fluorescein (free acid, CI 45350) is a xanthene dye. Fluorescein (free acid) molecule can be divided into two parts. One part contains xanthene moiety which acts as fluorophore and the other part of the molecule bears benzene moiety which is the fluorescence-controlling moiety.

Application

Fluorescein (free acid) has been used as a staining agent in retinal imaging.

Fluorescein (free acid) is widely used as a fluorescent stain and trace for many living cells and tissue applications. It is also suitable as a marker for the study of motility of bile canaliculi. Some of the clinical applications are evaluating the ocular surface and delineation of brain regions lacking a blood-brain barrier to permit accurate surgical resection of malignant glioma. Fluorescein angiography helps investigate changes in retinal blood supply. Fluorescein also plays a role as a physiological tracer to characterize the salmon′s intestinal permeability (Schep et al., 1998), and for the fluorophotometric measurement of aqueous humor flow. It is widely employed as a quantum yield standard.

Informations sur la sécurité

• Pictogrammes: GHS07
• Mention d'avertissement: Warning
• Mentions de danger: H319
• Conseils de prudence: P305 + P351 + P338
• Classification des risques: Eye Irrit. 2
• Code de la classe de stockage: 11 - Combustible Solids
• Classe de danger pour l'eau (WGK): WGK 3
• Point d'éclair (°F): Not applicable
• Point d'éclair (°C): Not applicable
• Équipement de protection individuelle: Eyeshields, Gloves, type N95 (US)