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Commission Directive 2008/84/EC (repealed)Show full title

Commission Directive 2008/84/EC of 27 August 2008 laying down specific purity criteria on food additives other than colours and sweeteners (Text with EEA relevance) (Codified version) (repealed)

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E 211 SODIUM BENZOATE

Definition
Chemical nameSodium benzoate
Sodium salt of benzenecarboxylic acid
Sodium salt of phenylcarboxylic acid
Einecs208-534-8
Chemical formulaC7H5O2Na
Molecular weight144,11
AssayNot less than 99 % of C7H5O2Na, after drying at 105 oC for four hours
DescriptionA white, almost odourless, crystalline powder or granules
Identification
A.Solubility
Freely soluble in water, sparingly soluble in ethanol
B.Melting range for benzoic acid
Melting range of benzoic acid isolated by acidification and not recrystallised 121,5 oC to 123,5 oC, after drying in a sulphuric acid desiccator
C.Positive tests for benzoate and for sodium
Purity
Loss on dryingNot more than 1,5 % after drying at 105 oC for four hours
Readily oxidisable substancesAdd 1,5 ml of sulphuric acid to 100 ml of water, heat to boiling point and add 0,1 N KMnO4 in drops, until the pink colour persists for 30 seconds. Dissolve 1 g of the sample, weighed to the nearest mg, in the heated solution, and titrate with 0,1 N KMnO4 to a pink colour that persists for 15 seconds. Not more than 0,5 ml should be required
Polycyclic acidsOn fractional acidification of a (neutralised) solution of sodium benzoate, the first precipitate must not have a different melting range from that of benzoic acid
Chlorinated organic compoundsNot more than 0,06 % expressed as chloride, corresponding to 0,25 % expressed as monochlorobenzoic acid
Degree of acidity or alkalinityNeutralisation of 1 g of sodium benzoate, in the presence of phenolphthalein, must not require more than 0,25 ml of 0,1 N NaOH or 0,1 N HCl
ArsenicNot more than 3 mg/kg
LeadNot more than 5 mg/kg
MercuryNot more than 1 mg/kg
Heavy metals (as Pb)Not more than 10 mg/kg

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