Sodium fluorescein / disodium fluorescein / sodium fluorescein orange

English name：Fluorescein disodium salt；Uranine；Uranine yellow；Soluble fluorescein；Resorcinolphthalein sodium；C.I.45350

Other names: sodium fluorescein; Fluorescein disodium;  Fluorescent orange red sodium; 9 - (o-carboxyphenyl) - 6-hydroxy-3h-xanthene-3-one disodium salt

CAS No.: 518-47-8

C20H10O5Na2=376.27

Grade: BS

pH（10g/L，25℃）：7.0～8.5

Loss on drying: ≤ 7.0%

Biological staining test: qualified

Water dissolution test: acceptable

Physicochemical properties: orange red powder. No smell. It is hygroscopic. It is easy to dissolve in water. The solution is yellow red and has strong yellow green fluorescence. It disappears after acidification and reappears after neutralization or alkalization. It is slightly soluble in ethanol and almost insoluble in chloroform and ether. The aqueous solution is isotonic with plasma. The maximum absorption wavelength (water) is 493.5mm. LD50 (rat, oral) 6721mg / kg

Purpose: biochemical research. Adsorption indicator; Redox indicator. Sulfur ion was analyzed by fluorescence spectrophotometry; Titration of chlorine, bromine and iodine

Saving: RT