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 POx.[4]

Lead(II) phosphate
Names
Systematic IUPAC name
Lead(II) phosphate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.028.368
EC Number
  • 231-205-5
RTECS number
  • OG3675000
UNII
UN number 3288 2291
  • 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
  • [O-]P(=O)([O-])[O-].[O-]P(=O)([O-])[O-].[Pb+2].[Pb+2].[Pb+2]
Properties
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)
0.000014 g/100 mL
Solubility insoluble in alcohol
soluble in nitric acid
−182.0·10−6 cm3/mol
2.048
Hazards
GHS labelling:[1]
GHS08: Health hazardGHS09: Environmental hazard
Warning
H360Df, H373, H410
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).
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Infobox references

Preparation

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

3Pb(OH)2 + 2H3PO4 → Pb3(PO4)2 + 6H2O

References
  1. "Lead phosphate". pubchem.ncbi.nlm.nih.gov. Retrieved 27 April 2023.
  2. "Lead(II) phosphate". The Chemical Thesaurus. Retrieved 11 October 2010.
  3. Wright, John, (2003). Environmental Chemistry pg 211. New York (NY): Routledge.
  4. Lewis, Richard J., Lewis, Richard J. Sr., (2008). Hazardous chemicals desk reference (sixth ed.) pg 831. Hoboken (NJ): John Wiley & Sons, Inc.


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