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Commission Directive 2008/84/EC (repealed)Show full title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purity criteria on food additives other than colours and sweeteners (Text with EEA relevance) (Codified version) (repealed)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 452 (ii) POTASSIUM POLYPHOSPHATE

SynonymsPotassium metaphosphate
Potassium polymetaphosphate
Kurrol salt
Definition
Chemical namePotassium polyphosphate
Einecs232-212-6
Chemical formula(KPO3)n
Heterogenous mixtures of potassium salts of linear condensed polyphosphoric acids of general formula H(n + 2)PnO(3n + 1) where ‘n’ is not less than 2
Molecular weight(118)n
P2O5 contentNot less than 53,5 % and not more than 61,5 % on the ignited basis
DescriptionFine white powder or crystals or colourless glassy platelets
Identification
A.Solubility
1 g dissolves in 100 ml of a 1 in 25 solution of sodium acetate
B.Positive tests for potassium and for phosphate
C.pH of a 1 % suspension
Not more than 7,8
Purity
Loss on ignitionNot more than 2 % (105 oC, four hours followed by ignition at 550 oC, 30 minutes)
Cyclic phosphateNot more than 8 % on P2O5 content
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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