Calcii Phosphas Praecipitatus.Precipitated Calcium Phosphate. Ca2(Po4)2=309.33. Synonym. - Precipitated Lime Phosphate.


Made from Bone Ash (impure Calcium Phosphate) digested with diluted Hydrochloric acid, made alkaline with solution of Ammonia, and by precipitation.


A light, white amorphous powder, colorless and tasteless, and permanent in the air. Solubility. - Almost insoluble in water.

Precipitated Calcium Phosphate is contained in Pulvis Antimonialis.

Dose, 5 to 30 gr.; .30 to 2.00 gm.


Syrupus Calcii Lactophosphatis

Syrup of Calcium Lactophosphate. Precipitated Calcium Carbonate, 25; Phosphoric Acid, 36; Lactic Acid, 60; Orange Flower Water, 25; Sugar, 700; Water, to 1000. Dose, 1 to 2 fl. dr.; 4. to 8. c.c.

Action and Therapeutics of Calcium Phosphate

Calcium phosphate is a most important constituent of bones, and therefore it is necessary that food should contain it. If not, the bones become soft. Calcium salts are abundant in milk, yolk of egg, vegetables, and the bones that carnivora eat. They are absorbed from the intestine, and the excess is excreted into the intestine and passed with the faeces. Calcium phosphate has been given for rickets, and for the anaemia and feebleness often seen in young children, but it is not certain that it does any good. It is important that calcium phosphate should be made from bones when used in the treatment of rickets. It may be given to pregnant and nursing women in order to provide the child with sufficient calcium salts for its bones.

It is used as a diluent for powders, as it is inert, and it prevents their agglutination. For these reasons, and because it is almost insoluble, it is a useful constituent of pills containing essential oils. The syrup of calcium lactophosphate is with many a favorite prescription for tuberculosis and other conditions of anaemia and weakness.

5. Calx Sulphurata, see Sulphur.