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Lead(II) phosphate

Summary

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
  • 7446-27-7 checkY
3D model (JSmol)
  • Interactive image
ChemSpider
  • 22442 checkY
ECHA InfoCard 100.028.368 Edit this at Wikidata
EC Number
  • 231-205-5
  • 24009
RTECS number
  • OG3675000
UNII
  • 62I1T06190 checkY
UN number 3288 2291
  • DTXSID5064706 Edit this at Wikidata
  • 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 edit

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

3Pb(OH)2 + 2H3PO4 → Pb3(PO4)2 + 6H2O

References edit

  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.