calcium hydrogen phosphate dihydrate
| Formula | CaHO4P*2H2O |
| Chemical formula | CaHPO4 *2H2O |
| Molar mass | 172.10 g/mol |
| CAS number | 7789-77_7 |
| HS Code | 28352510 |
| EC number | 231-826-1 |
| Storage | at +2 °C to +25 °C |
| SDS | available |
| Odour | odourless |
| Form | solid |
| Color | white |
| p H value | 7.5 (100 g/l 25°C) |
| Solubility in water | 0.2 g/l (25°C) |
| Solubility in ethanol | sparingly soluble (20°C) |
| Thermal decomposition | >109 °C |
| Assay | 98.0 – 105.0 | % | |
| Description | Conforms | ||
| Identification | Conforms | ||
| Solubility | Conforms | ||
| Chloride | ≤ | 0.25 | % |
| Loss on ignition | 24.5 to 26.5 | % | |
| Heavy metals | ≤ | 0/003 | % |
| Sulphate | ≤ | 0/5 | % |
| Arsenic | ≤ | 0/0003 | % |
| Carbonate | Conforms | ||
| Barium | Conforms | ||
| Limit of acid insoluble substances | ≤ | 0/2 | % |
| Limit of fluoride | ≤ | 0/005 | % |
Calcium hydrogen phosphate dihydrate is an inorganic compound composed of calcium, hydrogen phosphate ions, and water molecules, commonly used as a dietary supplement and in pharmaceuticals.
🏭⚗️ Production
It is produced industrially by reacting calcium salts like calcium chloride with phosphate salts under controlled conditions, followed by crystallization to obtain the dihydrate form. In laboratory or pharmaceutical preparations, it is typically synthesized by controlled precipitation from aqueous solutions.
🔬 Properties
Calcium hydrogen phosphate dihydrate appears as a white crystalline powder, sparingly soluble in water. Its chemical formula is CaHPO₄·2H₂O with a molar mass of approximately 172.06 g/mol. It is stable under normal conditions and commonly used due to its bioavailability.
🧪 Applications
This compound is widely used as a calcium and phosphate dietary supplement, in antacid formulations, and as an excipient in tablets. It also finds use in food fortification and animal feed.
⚠️ Safety
Calcium hydrogen phosphate dihydrate is generally safe for consumption in recommended amounts. It should be stored in a cool, dry place and handled with standard protective measures to avoid dust inhalation or eye contact.
