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 |
