Dicalcium Phosphate
Dicalcium phosphate is the calcium phosphate with the formula CaHPO4 and its dihydrate.It is also known as dibasic calcium phosphate or calcium monohydrogen phosphate. Dicalcium phosphate is used as a food additive, it is found in some toothpastes as a polishing agent and is a biomaterial.
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Chemical name:
Dicalcium Phosphate Dihydrate
Molecular Formula:
CaHPO4.2H2O
Molecular Weight:
172.09
Physical properties:
White monoclinic crystal powder; odorless and colorless; soluble in diluted Hydrochloric Acid, Nitric Acid and Acetic Acid; slightly soluble in water but insoluble in Ethanol; its relative density is 2.32; stable in air; it will lose its water of crystallization when heated to 75℃ and will convert to Dicalcium Phosphate Anhydrous.
Quality standard:
GB1889-2004、FCC-V、USP-32
| Parameter | GB1889-2004 | FCC-V | USP-32 |
| Appearance | White powder | White powder | White powder |
| Assay (as CaHPO4.2H2O),% | 98.0-103.0 | 97.0-105.0 | 98.0-105.0 |
| Fluoride | 0.005 | 0.005 | 0.005 |
| Loss on ignition, % | 24.5-26.5 | 24.5-26.5 | 24.5-26.5 |
| Heavy metals(as Pb), ≤% | 0.001 | - | 0.003 |
| Pb ≤% | 0.0005 | 0.0002 | - |
| As ≤% | 0.0002 | 0.0003 | 0.0003 |
| Insoluble in Hydrochloric Acid ≤% | 0.05 | - | 0.2 |
| Chloride ≤% | - | - | 0.25 |
| Sulphate ≤% | - | - | 0.5 |
| Carbonate | - | - | Pass Test |
| Barium | - | - | Pass Test |
