Table E.22.
Specifications for sodium polyphosphate (E 452(i) I. Soluble polyphosphate) according to Commission Regulation (EU) No 231/2012 and as INS 452(i) according to JECFA (2012a,b)
| Commission Regulation (EU) No 231/2012 | JECFA (2012a,b) | |
|---|---|---|
| Assay | P2O5 content not less than 60% and not more than 71% on the ignited basis | Not less than 60.0% and not more than 71.0% of P2O5 |
| Description | Colourless or white, transparent platelets, granules or powders | Colourless or white, transparent platelets, granules or powders |
| Identification | ||
| Test for sodium | Passes test | A 1 in 20 solution passes test |
| Test for phosphate | Passes test | Dissolve 0.1 g of the sample in 5 mL of hot dilute nitric acid TS. Warm on a steam bath for 10 min and cool. Neutralise to litmus with sodium hydroxide TS, and add silver nitrate TS. A yellow precipitate is formed which is soluble in dilute nitric acid TS |
| Solubility | Very soluble in water | Very soluble in water |
| pH | Between 3.0 and 9.0 (1% solution) | – |
| Purity | ||
| Loss on ignition | Not more than 1% | Not more than 1.0% |
| Water‐insoluble matter | Not more than 0.1% | Not more than 0.1% |
| Fluoride | Not more than 10 mg/kg (expressed as fluorine) | Not more than 10 mg/kg |
| Arsenic | Not more than 1 mg/kg | Not more than 3 mg/kg |
| Cadmium | Not more than 1 mg/kg | – |
| Lead | Not more than 1 mg/kg | Not more than 4 mg/kg |
| Mercury | Not more than 1 mg/kg | – |