Lead(II) oxalate

Lead(II) oxalate
Identifiers
CAS Number	814-93-7 ;
3D model (JSmol)	Interactive image;
ChemSpider	55161;
ECHA InfoCard	100.011.284
EC Number	212-413-5;
PubChem CID	197481;
UNII	642NGP7E5U ;
UN number	2291
CompTox Dashboard (EPA)	DTXSID70883589 ;
	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/cm3
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⦵298)	146.0216 J
Std enthalpy of; formation (ΔfH⦵298)	-851.444 kJ/mol
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Nephrotoxin, Reproductive Toxin, Neurotoxin, IARC Carcinogen, Birth Defects, Highly Toxic
Ingestion hazards	Toxic if swallowed. Seek medical attention immediately.
Inhalation hazards	Toxic if inhaled. Get breathing assistance immediately.
Eye hazards	Causes irritation.
Skin hazards	Harmful if absorbed in the skin. Causes irritation.
	GHS labelling:
Pictograms
	NIOSH (US health exposure limits):
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 organic 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

^ "Lead(II) Oxalate". Chemistry Reference. http://www.chemistry-reference.com/q_compounds.asp?CAS=814-93-7.
^ "Lead Oxalate". American Elements: The World's Manufacturer of Engineered & Advanced Materials. http://www.americanelements.com/pboxl.html.
^ 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.
^ 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.

[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.

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