Chemistry:Lead(II) phosphate

Lead(II) phosphate

Names
Systematic IUPAC name Lead(II) phosphate
Identifiers
CAS Number	7446-27-7 Y
3D model (JSmol)	Interactive image
ChemSpider	22442 Y
EC Number	231-205-5
PubChem CID	24009
RTECS number	OG3675000
UNII	62I1T06190 Y
UN number	3288 2291
InChI InChI=1S/2H3O4P.3Pb/c2*1-5(2,3)4;;;/h2*(H3,1,2,3,4);;;/q;;3*+2/p-6 N Key: HUTDDBSSHVOYJR-UHFFFAOYSA-H N
SMILES [O-]P(=O)([O-])[O-].[O-]P(=O)([O-])[O-].[Pb+2].[Pb+2].[Pb+2]
Properties
Chemical formula	Pb3(PO4)2
Molar mass	811.54272 g/mol
Appearance	white powder
Density	6.9 g/cm3
Melting point	1,014 °C (1,857 °F; 1,287 K)
Solubility in water	0.000014 g/100 mL
Solubility	insoluble in alcohol soluble in nitric acid
Magnetic susceptibility (χ)	−182.0·10−6 cm3/mol
Refractive index (nD)	2.048
Hazards
GHS pictograms
GHS Signal word	Warning
GHS hazard statements	H360Df, H373, H410
GHS precautionary statements	P203Category:GHS errors, P260, P273, P280, P318Category:GHS errors, P319Category:GHS errors, P391, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Lead(II) phosphate is an ionic compound with chemical formula Pb₃(PO₄)₂. Lead(II) phosphate is a long-lived electronically neutral reagent chemical. Despite limited tests on humans, it has been identified as a carcinogen based on tests on animals conducted by the EPA. Lead(II) phosphate appears as hexagonal, colorless crystals or as a white powder. Lead(II) phosphate is insoluble in water and alcohol but soluble in nitric acid (HNO₃) and fused alkali metal hydroxides. When lead(II) phosphate is heated for decomposition it emits very toxic fumes containing Lead (Pb) and PO_x.

Preparation

It is prepared by reacting lead(II) acetate with sodium orthophosphate.

3Pb(OH)
2 + 2H
3PO
4 → Pb
3(PO
4)
2 + 6H
2O