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Commission Regulation (EU) No 231/2012Dangos y teitl llawn

Commission Regulation (EU) No 231/2012 of 9 March 2012 laying down specifications for food additives listed in Annexes II and III to Regulation (EC) No 1333/2008 of the European Parliament and of the Council (Text with EEA relevance)

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E 339 (iii) TRISODIUM PHOSPHATE

SynonymsSodium phosphate; Tribasic sodium phosphate; Trisodium orthophosphate
DefinitionTrisodium phosphate is obtained from aqueous solutions and crystallises in the anhydrous form and with 1/2, 1, 6, 8 or 12 H2O. The dodecahydrate always crystallises from aqueous solutions with an excess of sodium hydroxide. It contains ¼ molecule of NaOH
Einecs231-509-8
Chemical nameTrisodium monophosphate; Trisodium phosphate; Trisodium orthophosphate
Chemical formula

Anhydrous: Na3PO4

Hydrated: Na3PO4 nH2O (n = 1/2, 1, 6, 8, or 12)

Molecular weight163,94 (anhydrous)
Assay

Sodium phosphate anhydrous and the hydrated forms, with the exception of the dodecahydrate, contain not less than 97,0 % of Na3PO4 calculated on the dried basis. Sodium phosphate dodecahydrate contains not less than 92,0 % of Na3PO4 calculated on the ignited basis

P2O5 content between 40,5 % and 43,5 % on the anhydrous basis

DescriptionWhite odourless crystals, granules or crystalline powder
Identification
Test for sodiumPasses test
Test for phosphatePasses test
SolubilityFreely soluble in water. Insoluble in ethanol
pHBetween 11,5 and 12,5 (1 % solution)
Purity
Loss on ignitionWhen dried at 120 °C for two hours and then ignited at about 800 °C for 30 minutes, the losses in weight are as follows: anhydrous not more than 2,0 %, monohydrate not more than 11,0 %, dodecahydrate: between 45,0 % and 58,0 %
Water insoluble matterNot more than 0,2 % on the anhydrous basis
FluorideNot more than 10 mg/kg (expressed as fluorine)
ArsenicNot more than 1 mg/kg
CadmiumNot more than 1 mg/kg
LeadNot more than 1 mg/kg
MercuryNot more than 1 mg/kg

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