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Commission Directive 2008/84/EC (repealed)Show full title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purity criteria on food additives other than colours and sweeteners (Text with EEA relevance) (Codified version) (repealed)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 422 GLYCEROL

SynonymsGlycerin
Glycerine
Definition
Chemical names1,2,3-propanetriol
Glycerol
Trihydroxypropane
Einecs200-289-5
Chemical formulaC3H8O3
Molecular weight92,1
AssayContent not less than 98 % of glycerol on the anhydrous basis
DescriptionClear, colourless hygroscopic syrupy liquid with not more than a slight characteristic odour, which is neither harsh nor disagreeable
Identification
A.Acrolein formation on heating
Heat a few drops of the sample in a test tube with about 0,5 g of potassium bisulphate. The characteristic pungent vapours of acrolein are evolved
B.Specific gravity (25/25 oC)
Not less than 1,257
C.Refractive index [n]D20
Between 1,471 and 1,474
Purity
WaterNot more than 5 % (Karl Fischer method)
Sulphated ashNot more than 0,01 % determined at 800 ± 25 oC
ButanetriolsNot more than 0,2 %
Acrolein, glucose and ammonium compoundsHeat a mixture of 5 ml of glycerol and 5 ml of potassium hydroxide solution (1 in 10) at 60 oC for five minutes. It neither becomes yellow nor emits an odour of ammonia
Fatty acids and estersNot more than 0,1 % calculated as butyric acid
Chlorinated compoundsNot more than 30 mg/kg (as chlorine)
ArsenicNot more than 3 mg/kg
LeadNot more than 2 mg/kg
MercuryNot more than 1 mg/kg
CadmiumNot more than 1 mg/kg
Heavy metals (as Pb)Not more than 5 mg/kg

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