Table E.26.
Specifications for calcium polyphosphate (E 452(iv)) according to Commission Regulation (EU) No 231/2012 and as INS 452(iv) according to JECFA (2012a,b)
| Commission Regulation (EU) No 231/2012 | JECFA (2012a,b) | |
|---|---|---|
| Assay | P2O5 content not less than 71% and not more than 73% on the ignited basis | Not less than 50.0 and not more than 71.0% of P2O5 on the ignited basis |
| Description | Odourless, colourless crystals or white powder | Odourless, colourless crystals or powder |
| Identification | ||
| Test for calcium | Passes test | The solution of the test for phosphate gives positive tests for calcium |
| Test for phosphate | Passes test | Mix 0.5 g of the sample with 10 mL of nitric acid and 50 mL of water, boil for about 30 min and cool. The resulting solution is used for the test |
| Solubility | Usually sparingly soluble in water. Soluble in acid medium | Usually incompletely soluble in water; soluble in acid medium |
| CaO content | 27–29.5% | – |
| Purity | ||
| Loss on ignition | Not more than 2% (105°C, 4 h than 550°C, 30 min) | Not more than 2% after drying (105°C, 4 h) followed by ignition (550°C, 30 min) |
| Cyclic phosphate | Not more than 8% (on P2O5 content) | Not more than 8% calculated on P2O5 content |
| Fluoride | Not more than 30 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 | – |