Ammonium oxalate

Ammonium oxalate
Names
	IUPAC name Ammonium oxalate
	Systematic IUPAC name Ammonium ethanedioate
	Other names Diammonium oxalate
Identifiers
CAS Number	1113-38-8 ; 6009-70-7 (monohydrate) ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:91241 ;
ChemSpider	13577 ;
ECHA InfoCard	100.012.912
PubChem CID	14213;
UNII	0PB8MO5U0H ; L4MP14OB48 (monohydrate) ;
CompTox Dashboard (EPA)	DTXSID50889443 ;
	InChI InChI=1S/C2H2O4.2H3N/c3-1(4)2(5)6;;/h(H,3,4)(H,5,6);21H3 Key: VBIXEXWLHSRNKB-UHFFFAOYSA-N ; InChI=1S/C2H2O4.2H3N/c3-1(4)2(5)6;;/h(H,3,4)(H,5,6);21H3;
	SMILES [O-]C(=O)C([O-])=O.[NH4+].[NH4+];
Properties
Chemical formula	[NH4]2C2O4
Molar mass	124.096 g·mol−1
Appearance	Colorless or white crystalline solid
Density	1.5 g/cm3
Melting point	70 C (158 F, 343.15 K)
Solubility in water	5.20 g/(100 ml) (25 °C)
Hazards
	GHS labelling:
Hazard statements	H302, H312, H319
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Ammonium oxalate is a chemical compound with the chemical formula [N H₄]₂C₂O₄. Its formula is often written as (NH₄)₂C₂O₄ or (COONH₄)₂. It is an ammonium salt of oxalic acid. It consists of ammonium cations ([NH₄]⁺) and oxalate anions (C₂O2−4). The structure of ammonium oxalate is ([NH₄]⁺)₂[C₂O₄]²⁻. Ammonium oxalate sometimes comes as a monohydrate ([NH₄]₂C₂O₄·H₂O). It is a colorless or white salt under standard conditions and is odorless and non-volatile. It occurs in many plants and vegetables.

Vertebrate

It is produced in the body of vertebrates by metabolism of glyoxylic acid or ascorbic acid. It is not metabolized but excreted in the urine.^[2] It is a constituent of some types of kidney stone.^[3]^[4] It is also found in guano.

Mineralogy

Oxammite is a natural mineral form of ammonium oxalate. This mineral is extremely rare. It is an organic mineral derived from guano.^[5]

Chemistry

Ammonium oxalate is used as an analytical reagent and general reducing agent.^[2] It and other oxalates are used as anticoagulants, to preserve blood outside the body.^{[citation needed]}

Earth sciences

Acid ammonium oxalate (ammonium oxalate acidified to pH 3 with oxalic acid) is commonly employed in soil chemical analysis to extract iron and aluminium from poorly-crystalline minerals (such as ferrihydrite), iron(II)-bearing minerals (such as magnetite) and organic matter.^[6]^{[page needed]}

References

^ ^a ^b John Rumble (June 18, 2018). CRC Handbook of Chemistry and Physics (99th ed.). CRC Press. pp. 4–41. ISBN 978-1138561632.
^ ^a ^b National Center for Biotechnology Information. PubChem Compound Database; CID 14213 (accessed 15 November 2016).
^ The International Pharmacopoeia, p.1292, Volume 1, World Health Organization, 2006 ISBN 92-4-156301-X.
^ N G Coley, "The collateral sciences in the work of Golding Bird (1814–1854)", Medical History, iss.4, vol.13, October 1969, pp.372.
^ "Home". mindat.org.
^ Rayment, George; Lyons, David (2011). Soil Chemical Methods - Australasia. CSIRO Publishing. ISBN 9780643101364.

[crc-1] John Rumble (June 18, 2018). CRC Handbook of Chemistry and Physics (99th ed.). CRC Press. pp. 4–41. ISBN 978-1138561632.

[pubchem-2] National Center for Biotechnology Information. PubChem Compound Database; CID 14213 (accessed 15 November 2016).

[3] The International Pharmacopoeia, p.1292, Volume 1, World Health Organization, 2006 ISBN 92-4-156301-X.

[4] N G Coley, "The collateral sciences in the work of Golding Bird (1814–1854)", Medical History, iss.4, vol.13, October 1969, pp.372.

[5] "Home". mindat.org.

[6] Rayment, George; Lyons, David (2011). Soil Chemical Methods - Australasia. CSIRO Publishing. ISBN 9780643101364.

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