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Commission Directive 2008/84/EC (repealed)Show full title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purity criteria on food additives other than colours and sweeteners (Text with EEA relevance) (Codified version) (repealed)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 340 (ii) DIPOTASSIUM PHOSPHATE

SynonymsDipotassium monophosphate
Secondary potassium phosphate
Dipotassium acid phosphate
Dipotassium orthophosphate
Dibasic potassium phosphate
Definition
Chemical nameDipotassium hydrogen monophosphate
Dipotassium hydrogen phosphate
Dipotassium hydrogen orthophosphate
Einecs231-834-5
Chemical formulaK2HPO4
Molecular weight174,18
AssayContent not less than 98 % after drying at 105 oC for four hours
P2O5 contentBetween 40,3 % and 41,5 % on the anhydrous basis
DescriptionColourless or white granular powder, crystals or masses; deliquescent substance
Identification
A. Positive tests for potassium and for phosphate
B. Solubility
Freely soluble in water. Insoluble in ethanol
C. pH of a 1 % solution
Between 8,7 and 9,4
Purity
Loss on dryingNot more than 2,0 % determined by drying at 105 oC for four hours
Water-insoluble substancesNot more than 0,2 % on the anhydrous basis
FluorideNot more than 10 mg/kg (expressed as fluorine)
ArsenicNot more than 3 mg/kg
CadmiumNot more than 1 mg/kg
LeadNot more than 4 mg/kg
MercuryNot more than 1 mg/kg

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