Lead(II) oxalate

Lead(II) oxalate

Identifiers
CAS Number	814-93-7
ChemSpider	55161
EC Number	212-413-5
Jmol interactive 3D	Image
PubChem	197481
UN number	2291
InChI InChI=1S/C2H2O4.Pb/c3-1(4)2(5)6;/h(H,3,4)(H,5,6);/q;+2/p-2
SMILES C(=O)(C(=O)[O-])[O-].[Pb+2]
Properties
Chemical formula	PbC2O4
Molar mass	295.219
Appearance	White Powder
Density	5.28 g/cm^3
Melting point	327.4 °C (621.3 °F; 600.5 K)
Boiling point	1,740 °C (3,160 °F; 2,010 K)
Thermochemistry
Std molar entropy (S^o298)	146.0216 J [1]
Std enthalpy of formation (ΔfH^o298)	-851.444 kJ/mol
Hazards
Main hazards	Nephrotoxin, Reproductive Toxin, Neurotoxin, IARC Carcinogen, Birth Defects, Highly Toxic
GHS pictograms
EU classification (DSD)	6.1
Ingestion hazard	Toxic if swallowed. Seek medical attention immediately.
Inhalation hazard	Toxic if inhaled. Get breathing assistance immediately.
Eye hazard	Causes irritation.
Skin hazard	Harmful if absorbed in the skin. Causes irritation.
US health exposure limits (NIOSH):
PEL (Permissible)	0.05 mg/m3, as Pb
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Lead(II) oxalate is an inorganic compound with the formula PbC₂O₄. It is naturally found as a heavy white solid.^[2]

Preparation

This compound is commercially available. It may be prepared by the metathesis reaction between lead(II) nitrate and sodium oxalate:^[3]

Pb²⁺(aq) + C₂O₄²⁻ → PbC₂O₄ (s)

Solubility

Lead(II) oxalate is sparingly soluble in water. Its solubility is increased in presence of excess oxalate anions, due to the formation of the Pb(C₂O₄)₂²⁻ complex ion.^[4]

References

1. "Lead(II) Oxalate". Chemistry Reference. http://www.chemistry-reference.com/q_compounds.asp?CAS=814-93-7.
2. "Lead Oxalate". American Elements: The World's Manufacturer of Engineered & Advanced Materials. http://www.americanelements.com/pboxl.html.
3. Grases, F.; Ruiz, J.; Costa-Bauzá, A. (1993). "Studies on Lead Oxalate Crystalline Growth". Journal of Colloid and Interface Science 155 (2): 265–270. doi:10.1006/jcis.1993.1035.
4. Kolthoff, I.M.; Perlich, R. W.; Weiblen, D. (1942). "The Solubility of lead Sulfate and of Lead Oxalate in Various Media". Journal of Physical Chemistry 46 (5): 561. doi:10.1021/j150419a004.