Lead(II) phosphate

Lead(II) phosphate is an ionic compound with chemical formula Pb₃(PO₄)₂. Lead(II) phosphate is a long-lived electronically neutral reagent chemical.^[2] Despite limited tests on humans, it has been identified as a carcinogen based on tests on animals conducted by the EPA.^[3] 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.^[4]

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
ECHA InfoCard	100.028.368
EC Number	231-205-5
PubChem CID	24009
RTECS number	OG3675000
UNII	62I1T06190 Y
UN number	3288 2291
CompTox Dashboard (EPA)	DTXSID5064706
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 labelling:[1]
Pictograms
Signal word	Warning
Hazard statements	H360Df, H373, H410
Precautionary statements	P203, P260, P273, P280, P318, P319, P391, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

Preparation

It is prepared by reacting lead(II) hydroxide with orthophosphoric acid.

3Pb(OH)₂ + 2H₃PO₄ → Pb₃(PO₄)₂ + 6H₂O