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Dicalcium phosphate is the calcium phosphate with the formula CaHPO 4 and its dihydrate. The "di" prefix in the common name arises because the formation of the HPO 4 2– anion involves the removal of two protons from phosphoric acid , H 3 PO 4 .
Calcium phosphate stones account for approximately 15% of kidney stone disease. Calcium phosphate stones tend to grow in alkaline urine, especially when Proteus bacteria are present. It is the most common type in pregnant women. [6] Calcium phosphate is the usual constitution of microcalcifications of the breast, particularly dystrophic ...
As calcium is required for bone development, many bone diseases can be traced to the organic matrix or the hydroxyapatite in molecular structure or organization of bone. Osteoporosis is a reduction in mineral content of bone per unit volume, and can be treated by supplementation of calcium, vitamin D, and bisphosphonates .
Example of a calcium feed phosphate production. Phosphoric acid is neutralized by means of calcium oxide or calcium carbonate, or a mixture of them. Dicalcium phosphate: H 3 PO 4 + CaO + H 2 O ↔ CaHPO 4 + 2 H 2 O Monocalcium phosphate: 2H 3 PO 4 + CaO + H 2 O ↔ Ca(H 2 PO 4) 2.H 2 O + H 2 O Or : Based on dicalcium phosphate
The anhydrous forms can be prepared by heating dicalcium phosphate: [2] 2 CaHPO 4 → Ca 2 P 2 O 7 + H 2 O. At 240-500 °C an amorphous phase is formed, heating to 750 °C forms β-Ca 2 P 2 O 7, heating to 1140 - 1350 °C forms the α-Ca 2 P 2 O 7.
Amorphous calcium phosphate (ACP) is a glassy solid that is formed from the chemical decomposition of a mixture of dissolved phosphate and calcium salts (e.g. (NH 4) 2 HPO 4 + Ca(NO 3) 2). The resulting amorphous mixture consists mostly of calcium and phosphate, but also contains varying amounts of water and hydrogen and hydroxide ions ...
10% calcium gluconate solution (given intravenously) is the form of calcium most widely used in the treatment of low blood calcium.This form of calcium is not as well absorbed as calcium lactate, [12] and it only contains 0.93% (93 mg/dL) calcium ion (defined by 1 g weight solute in 100 mL of solution to make 1% solution w/v).
Tetracalcium phosphate is a component used in the formation of some hydroxyapatite calcium phosphate cements that used for the repair of bone defects. [3] One example of a hydroxyapatite cement forming reaction is that of tetracalcium phosphate and dicalcium diphosphate dihydrate: [4] Ca 4 (PO 4) 2 O + CaHPO 4 ·2H 2 O → Ca 5 (PO 4) 3 (OH ...
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