Calcium hydroxyapatite

Description

A white, odorless, tasteless powder. Bone is primarily composed of calcium hydroxyapatite mixed with Calcium carbonate and organic binders. Calcium hydroxyapatite is used in the manufacture of Milk glass, as a polishing powder, as a mordant and as a buffer.

See also Apatite.

Synonyms and Related Terms

tribasic calcium phosphate; tricalcium orthophosphate; tricalcium phosphate; bone ash

FTIR (PMA)

XRD

SEM

EDS

Risks

Nonflammable.

Merz: SDS

Physical and Chemical Properties

Soluble in mineral acids. Insoluble in water, ethanol, acetic acid.

Composition	Ca10(PO4)6(OH)2
CAS	1306-06-5
Melting Point	1670
Density	3.18
Molecular Weight	mol. wt. = 1004.69
Refractive Index	1.63

Sources Checked for Data in Record

• Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993

• Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976

• The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 1741