English Name:Tetraiodofluorescein sodium salt；Erythrosin； Sodium tetraiodofluorescein；Iodeosine；Erythrosine BS； Pyrosine B；Dianthine B；Erythrosin B
Other names: fuchsin; Fuchsin B; Acid lichen red; Disodium 2 ', 4', 5 ', 7' - tetraiodofluorescein; Disodium tetraiodofluorescein; Phycoerythrin B sodium salt; Red moss red B; Lubricant X-1; N. N'- ethylidene distearamide; Spiro isobenzofuran-1 (3H), 9 '-[9h] tons -3-ketone-3', 6 '- dihydroxy-2', 4 ', 5', 7 '- tetraiodo disodium salt; Tetraiodofluorescein B; Acid red 51

CAS No.: 16423-68-0

C20H6I4Na2O5=879.88

Level: high purity

Content (dry): ≥ 95.0%

Sensitivity test: acceptable

Water dissolution test: qualified

 Physicochemical  Properties: brown powder. It is cherry red in aqueous solution and soluble in ethanol. Add hydrochloric acid to precipitate yellowish brown precipitate in the aqueous solution, add sodium hydroxide to form red precipitate, but it can be dissolved in excess reagent. The maximum absorption wavelength (in water) is 524nm, (in 95% ethanol) is 531nm. Low toxicity, LD50 (rat, oral) 2558mg/kg

Purpose: biochemical research. Adsorption indicator for precipitation titration. Fluorescent indicator for acid-base titration, no fluorescence when pH is greater than 2.5, and light green fluorescence when pH is not less than 4.0. Photometry reagent. Biological stain

Save: RT, away from light