Erythrosine

الوصف

SYNONYMS ERYTHROSINE* C. I. FOOD RED *4 * FD & C RED 3 * ACID RED *1 COLOUR INDEX NO. ****0 EEC NUMBER E***7 CHEMICAL FORMULA C*0H6I4Na2O5H2O MOLECULAR WEIGHT **7.*8 ASSAY Content not less than *5% total colouring matters, calculated as the anhydrous sodium salt; E 1% 1cm 1 **0 at ca **6 nm in aqueous solution at pH7 DESCRIPTION  Red powder IDENTIFICATION    a. Spectrometry b. Red solution in water  Maximum in water at ca **6 nm at pH7. PURITYInorganic iodides calculated as sodium iodide Not more than 0.1% Water Insoluble matter Not more than 0.2% Subsidiary colouring matters (exceptfluorescein) Not more than 4.0% Organic compounds other than colouring matters [Tri-iodoresorcinol] - Not more than 0.2% [*-(2,*-dihydroxy*3,*-diodobenzoic acid] - Not more than 0.2% Fluorescein Not more than *0 mg/kg. Ether extractable matter From a solution of pH from 7 through 8, not more than 0.2% Arsenic Not more than 3 mg/kg. Lead Not more than *0 mg/kg. Mercury Not more than 1 mg/kg. Cadmium Not more than 1 mg/kg. Heavy metals (as Pb) Not more than *0 mg/kg.