1694. Calcium Phosphate, Tribasic

Nomenclature

CAS number: 7758-87-4
Tricalcium orthophosphate; tricalcium phosphate; tertiary calcium phosphate; Calcigenol Simple.
Ca3O8P2; mol wt 310.18.
Ca 38.76%, O 41.26%, P 19.97%.
Ca3(PO4)2.

Description and references

It is about 96% pure, usually contg an excess of CaO. Occurs in nature as the minerals: oxydapatit, voelicherite, whitlockite. The technical product is also known as “bone ash”. Commercial prepn from phosphate rock: Hignett, Hubbard, Ind. Eng. Chem. 38, 1208 (1946); Elmore, US 2474831 (1949 to T.V.A.); Hollingsworth, US 2556541 and US 2562718 (both 1951 to Coronet Phosphate); Brosheer, Hignett, Chem. Eng. Rept. no. 7, 143 pp (1953).

Properties

Amorphous, odorless, tasteless powder. mp 1670°. d 3.14. Practically insol in water, alcohol or acetic acid; sol in dil HCl or HNO3.

Use

Manuf of fertilizers, H3PO4 and P compds; manuf milk-glass, polishing and dental powders, porcelains, pottery; enameling; clarifying sugar syrups; in animal feeds; as noncaking agent; in the textile industry.

Therapeutic Category

Calcium replenisher.

Therapeutic Category (Veterinary)

Has been used as a dietary supplement, and as an antacid.

Keywords

Replenishers/Supplements; Calcium