Fluorescein Sodium Salt (CAS 518-47-8) C. I. 45350 Acid Yellow 73 Uranin

• CAS No.: 518-47-8
• Formula: C20h10na2o5
• EINECS: 208-253-0
• Type: Dyestuff Intermediates
• Appearance: Powder
• Quality: Technical
• Model NO.: IND
• Colour: Orange-Brown
• Molar Mass: 376.27 G/Mol
• Storage: Store at Room Temperature
• Solubility: Soluble in Water (500 G/L) at 20deg
• Melting Point: >300deg
• Boiling Point: 662.6deg at 760 Mmhg (Predicted)
• Transport Package: 25 Kgs Fiber Drums
• Specification: IND
• Origin: Shenyang
• HS Code: 3204120000
• Production Capacity: 1000kgs Per Month

Product Description

Fluorescein sodium salt is a disodium salt of fluorescein and a noted pH sensitive fluorophore. Fluorescein sodium salt has been utilized in studies as a drug model, as a penetrating dye and also as a fluorescein tracer. Fluorescein sodium salt has also been used in vitro to quantify root dentin demineralization. Additional reported uses include microscopy, as a gain medium in dye laser use and to detect latent blood stains in vitro. Solubility :Soluble in water (500 g/l) at 20° C, ethanol (slightly soluble),Insoluble in benzene, chloroform, ether. Soluble in glacial acetic acid; also soluble in alkal i hydroxides or carbonates with a bright green fluoresence appearing red by transmitted light.

Items:	Specification:	Results:
Purity,percent:	99%	99.5%
Maximal absorption wavelength λ(PH8.0), nm	490-493	492
Quality absorption coefficient λ(PH8.0), L/(cm·g)	≥ 200	202
Solubility in water	Passes test	Passes test
Sensitivity test	Passes test	Passes test
Loss on drying, percent	≤5.0	4.80
Sulfated ash, percent	≤0.3	0.1