289396

Sigma-Aldrich

Hydroxyapatite

reagent grade, powder, synthetic

Synonym(s):
Calcium hydroxyphosphate, HAp, Hydroxylapatite, Calcium phosphate tribasic, Tribasic calcium phosphate
Linear Formula:
Ca5(OH)(PO4)3x
CAS Number:
Molecular Weight:
502.31
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.23
Pricing and availability is not currently available.

Quality Level

grade

reagent grade

form

powder
solid

mp

1100 °C (lit.)

solubility

H2O: insoluble(lit.)

SMILES string

Ca++.Ca++.Ca++.Ca++.OCa+.O-P(O-)(O-)=O.O-P(O-)(O-)=O.O-P(O-)(O-)=O

InChI

1S/5Ca.3H3O4P.H2O/c;;;;;3*1-5(2,3)4;/h;;;;;3*(H3,1,2,3,4);1H2/q5*+2;;;;/p-10

InChI key

XYJRXVWERLGGKC-UHFFFAOYSA-D

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General description

Hydroxyapatite is a key inorganic phosphate that has chemical and structural resemblance to bone. HAp is a popular biomaterial which finds use as a bone or teeth replacement and repair, hard tissue repair.

Application

Hydroxyapatite(HAp) was used to model intracranial calcification in a study. HAp forms biocomposites with a number of polymers for various uses, such as:
  • for comparison purposes during the preparation of HAp based biocomposites with PVA and collagen.
  • for preparation of poly(methyl methacrylate) (PMMA)/hydroxyapatite (HA) by powder liquid method to manufacture denture base composites.

Packaging

25, 100 g in poly bottle

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

RIDADR

NONH for all modes of transport

WGK Germany

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Biocomposites of nanohydroxyapatite with collagen and poly (vinyl alcohol).
Degirmenbasi N, et al.
Colloids and Surfaces. B, Biointerfaces, 48(1), 42-49 (2006)
Differentiation of low-attenuation intracranial hemorrhage and calcification using dual-energy computed tomography in a phantom system.
Nute JL, et al.
Investigative Radiology, 50(1), 9-9 (2015)
Hydroxyapatite and hydroxyapatite-based ceramics.
Orlovskii VP, et al.
Inorganic Materials, 38(10), 973-984 (2002)
Effects of titanate coupling agent on the mechanical, thermal, and morphological properties of poly (methyl methacrylate)/hydroxyapatite denture base composites.
Tham WL, et al.
Journal of Composite Materials, 45(22), 2335-2345 (2011)
Simulated body fluid and water absorption effects on poly (methyl methacrylate)/hydroxyapatite denture base composites.
Tham WL, et al.
Express Polymer Letters, 4(9), 517-528 (2010)
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