Riboflavin-5-Phosphate , a Natural Yellow, perfect substitute for Tartrazine, E 102. Chemical names Monosodium (2R,3R,4S)-5-(3′)10′-dihydro-7′,8′-dimethyl-2′,4′-dioxo-10′-benzo[γ]pteridinyl)-2,3,4-trihydroxypentyl phosphate; monosodium salt of 5′-monophosphate ester of riboflavin. This is a yellow to orange yellow crystalline powder, hygroscopic. It is soluble in water, very slightly soluble in alcohol, practically insoluble in Either. The chemical formula for the dihydrate form: C17H20N4NaO9P·2H2O, for the anhydrous form: C17H20N4NaO9P, and the molecular weight is 541,36.




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