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SYNONYMS ERYTHROSINE* C. I. FOOD RED 14 * FD & C RED 3 * ACID RED 51 COLOUR INDEX NO. 45430 EEC NUMBER E-127 Red powder
FORMULA C20H6I4Na2O5H2O MOLECULAR WEIGHT 897.88 ASSAY Content not less than 85% total colouring matters, calculated as the anhydrous sodium salt; E 1% 1cm 1 100 at ca 526 nm in aqueous solution at pH7 DESCRIPTION Red powder IDENTIFICATION a. Spectrometry b. Red solution in water Maximum in water at ca 526 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-(2,4-dihydroxy-3,5-diodobenzoic acid] - Not more than 0.2% Fluorescein Not more than 20 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 10 mg/kg. Mercury Not more than 1 mg/kg. Cadmium Not more than 1 mg/kg. Heavy metals (as Pb) Not more than 40 mg/kg.