Name of index | FCC-V | E341(iii) | USP-30 |
Assay, % | 34.0-40.0(as Ca) | ≥90(On the ignited basis) | 34.0-40.0 (as Ca) |
P2O5 Content% ≤ | -- | 38.5--48.0 (Anhydrous basis) | -- |
Description | White, odourless powder which is stable in air | ||
Identification | Pass test | Pass test | Pass test |
Water-soluble substance, % ≤ | -- | -- | 0.5 |
Acid-insoluble substance, % ≤ | -- | -- | 0.2 |
Carbonate | -- | -- | Pass test |
Chloride, % ≤ | -- | -- | 0.14 |
Sulfate, % ≤ | -- | -- | 0.8 |
Dibasic salt and calcium oxide | -- | -- | Pass test |
Solubility tests | -- | Practically insoluble in water and ethanol, soluble in dilute hydrochloric and nitric acid | -- |
Arsenic, mg/kg ≤ | 3 | 1 | 3 |
Barium | -- | -- | Pass test |
Fluoride, mg/kg ≤ | 75 | 50(expressed as fluorine) | 75 |
Nitrate | -- | -- | Pass test |
Heavy metals, mg/kg ≤ | -- | -- | 30 |
Lead, mg/kg ≤ | 2 | 1 | -- |
Cadmium, mg/kg ≤ | -- | 1 | -- |
Mercury, mg/kg ≤ | -- | 1 | -- |
Loss on ignition, % ≤ | 10.0 | 8.0(800ºC±25ºC,0.5h) | 8.0 (800ºC,0.5h) |
Aluminium | -- | Not more than 150 mg/kg (only if added to food for iinfants and young children). Not more than 500 mg/kg (for all uses except food for iinfants and young children). This applies until 31 March 2015. Not more than 200 mg/kg (for all uses except food for iinfants and young children). This applies from 1 April 2015. | -- |