Table E.12.
Specifications established for dimagnesium phosphate (E 343(ii)) according to Commission Regulation (EU) No 231/2012 and JECFA (2006a)
| Commission Regulation No 231/2012 | JECFA (2006b,c,d,e,f) | |
|---|---|---|
| Assay | Not less than 96% after ignition (800 ± 25°C for 30 min) | Not less than 96.0% on the ignited basis |
| Description | White, odourless, crystalline powder | Odourless white crystalline powder |
| Identification | ||
| Solubility | Slightly soluble in water | Slightly soluble in water, soluble in dilute acids, but insoluble in ethanol |
| Test for magnesium | Passes test | Dissolve 100 mg in 0.5 mL of diluted acetic acid TS and 20 mL of water. Add 1 mL of ferric chloride TS, let stand for 5 min and filter. The filtrate gives a positive test for magnesium |
| Test for phosphate | Passes test | Passes test |
| Purity | ||
| Loss on ignition | Not less than 29% and not more than 36% (800 ± 25°C to constant weight) | |
| MgO content | Not less than 21.5% after ignition or at an anhydrous basis (105°C, 4 h) | – |
| Fluoride | Not more than 10 mg/kg (as fluorine) | Not more than 10 mg/kg (Method III) |
| Arsenic | Not more than 1 mg/kg | Not more than 3 mg/kg |
| Lead | Not more than 1 mg/kg | Not more than 4 mg/kg |
| Cadmium | Not more than 1 mg/kg | – |
| Mercury | Not more than 1 mg/kg | – |