Table E.21.
Table 2 Specifications for pentapotassium triphosphate (E 451(ii)) according to Commission Regulation (EU) No 231/2012 and as INS 451(i) according to JECFA (2012a,b)
| Commission Regulation (EU) No 231/2012 | JECFA (2012a,b) | |
|---|---|---|
| Assay | Content not less than 85% on the anhydrous basis | Not less than 85% of K5O10P3 on the dried basis, the remainder being principally other potassium phosphates |
| Description | White, very hygroscopic powder or granules | Hygroscopic white granules or powder |
| Identification | ||
| Test for potassium | Passes test | Passes test |
| Test for phosphate | Passes test | Passes test |
| Solubility | Very soluble in water | Very soluble in water |
| pH | Between 9.2 and 10.5 (1% solution) | Between 9.2 and 10.1 (1% solution) |
| Purity | ||
| Loss on ignition | Not more than 0.4% (105°C, 4 h, then 550°C, 30 min) | Not more than 0.4% after drying (105°, 4 h) followed by ignition at 550° for 30 min) |
| Water‐insoluble matter | Not more than 2% | Not more than 2% |
| P2O5 content | P2O5 content not less than 46.5% and not more than 48% | Not less than 46.5% and not more than 48.0% |
| 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 | – |