Calcium hydroxyphosphate

Calcium hydroxyphosphate (calcium phosphate tribasic, tribasic calcium phosphate, hydroxyapatite, HAp) is an inorganic chemical compound that is made up of calcium, hydrogen, oxygen and phosphorus. Its formula is Ca₅(OH)(PO₄)₃.^[1]

Quick facts Names, Identifiers ...

Calcium hydroxyphosphate

Names
IUPAC name pentacalcium hydroxide triphosphate
Identifiers
CAS Number	1306-06-5 Y
3D model (JSmol)	Interactive image
ChEMBL	ChEMBL2218916
ChemSpider	26563461
ECHA InfoCard	100.013.769
EC Number	235-330-6
PubChem CID	14781
UNII	91D9GV0Z28 Y
CompTox Dashboard (EPA)	DTXSID50872537 DTXSID10872538, DTXSID50872537
InChI InChI=1S/5Ca.3H3O4P.H2O/c;;;;;3*1-5(2,3)4;/h;;;;;3*(H3,1,2,3,4);1H2/q5*+2;;;;/p-10 Key: XYJRXVWERLGGKC-UHFFFAOYSA-D
SMILES [OH-].[O-]P(=O)([O-])[O-].[O-]P(=O)([O-])[O-].[O-]P(=O)([O-])[O-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2]
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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It is found in the body and as the mineral hydroxyapatite.^{[citation needed]}