Category
Heterocyclic Organic Compound
Description
Alfa Chemistry offers Fluorescein products for various research purposes. Please contact us by email if you do not find the specification you are looking for on this page.
IUPAC Name
3',6'-dihydroxyspiro[2-benzofuran-3,9'-xanthene]-1-one
Molecular Formula
C20H12O5
Canonical SMILES
C1=CC=C2C(=C1)C(=O)OC23C4=C(C=C(C=C4)O)OC5=C3C=CC(=C5)O
InChI
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
InChI Key
GNBHRKFJIUUOQI-UHFFFAOYSA-N
Melting Point
315 °C(dec.)
Solubility
Insoluble in water
Very soluble in Acetone
Insoluble in Chloroform,Benzene,Ether
Appearance
Orange to Amber to Dark red powder to crystal
Application
Applications of xanthene dyes involve optical materials and organic dyes for medical diagnosis research. Several characteristic features of xanthene dyes are large absorption and luminescence, excellent light resistance, low toxicity in-vivo, and relatively high solubility in water.
Absorption Wavelength
(max.) 490(0.1mol/L NaOH sol.) nm
Color/Form
Red, orthorhombic prisms;Yellowish-red to red powder;Orange-red, crystalline powder
Covalently-Bonded Unit Count
1
Decomposition
When heated to decomposition it emits acrid smoke and irritating fumes.
Exact Mass
332.068473g/mol
Features And Benefits
Both cationic and anionic xanthene dyes are known to be efficient fluorescent dyes. Functional groups on the xanthene moiety control their fluorescent colors.
LogP
log Kow = 3.35 (est);3.4
Monoisotopic Mass
332.068473g/mol
Other Experimental
Fluorescein is a fluorescent indicator. From pH 4 to pH 4.5, it changes from colorless to green fluorescent.;Henry's Law constant = 8.9X10-17 atm-cu m/mol at 25 °C (est);Hydroxyl radical reaction rate constant = 2.0X10-10 cu cm/molec-sec at 25 °C (est)
Physical State
(20 deg.C) Solid
Storage Conditions
Store at room temperature and dry
Vapor Pressure
4.1X10-14 mm Hg at 25 °C (est)