SYNONYMS	ERYTHROSINE* C. I. FOOD RED 14 * FD & C RED 3 * ACID RED 51
DEFINITION	Erythrosine consists essentially of disodium 2-(2,4,5,7-tetraiodo-3-oxidooxoxanthen-9-y1) benzoate monohydrate and subsidary colouring matter together
	with water,sodium chloride and/or sodium sulfate as the principal uncoloured components. Erythrosine is
	described as the sodium salt. The calcium and the potassium salt are also permitted.
CLASS	xanthene
COLOUR INDEX NO.	45430
EEC NUMBER	E-127
EINECS	240-474-8
CHEMICAL NAMES	Disodium 2-(2,4,5,7-tetraiodo-3-oxido-6-oxoxanthen-9-y1) benzoate monohydrate
CHEMICAL 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	Maximum in water at ca 526 nm at pH7.
b. Red solution in water
PURITY	Not more than 0.1%
Inorganic iodides calculated as sodium iodide
Water Insoluble matter	Not more than 0.2%
Subsidiary colouring matters	Not more than 4.0%
(exceptfluorescein)
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.