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223425

Sigma-Aldrich

Potassium oxalate monohydrate

ACS reagent, 99%

Synonym(s):

Ethanedioic acid, Oxalic acid potassium salt

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About This Item

Linear Formula:
(COOK)2 · H2O
CAS Number:
6487-48-5
Molecular Weight:
184.23
Beilstein:
3752576
EC Number:
209-506-8
MDL number:
MFCD00150033
UNSPSC Code:
12352300
PubChem Substance ID:
329752307
NACRES:
NA.21

grade

ACS reagent

description

neutrality passes test

Assay

98.5-101.0% (ACS specification)
99%

form

crystals or chunks

impurities

H2SO4, passes test (darkened)
≤0.01% insolubles

pH

7.0-8.5 (25 °C, 50 g/L)

solubility

H2O: 10%

anion traces

chloride (Cl-): ≤0.002%
sulfate (SO42-): ≤0.01%

cation traces

Fe: ≤0.001%
NH4+: ≤0.002%
Na: ≤0.02%
heavy metals: ≤0.002% (by ICP)

SMILES string

O.[K+].[K+].[O-]C(=O)C([O-])=O

InChI

1S/C2H2O4.2K.H2O/c3-1(4)2(5)6;;;/h(H,3,4)(H,5,6);;;1H2/q;2*+1;/p-2

InChI key

QCPTVXCMROGZOL-UHFFFAOYSA-L

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General description

Potassium oxalate monohydrate (POM) is a potassium salt of oxalic acid. Its crystal structure has been investigated by three-dimensional neutron diffraction studies.

Application

Potassium oxalate monohydrate may be used in the preparation of SBA-15 (Santa Barbara Amoprhous-15)- catalyst.
Potassium oxalate monohydrate may be used in the synthesis of bis(2,2"-bipyridine) (oxalato-O,O′)nickel(ii) tetrahydrate, a mononuclear mixed-ligand complex.

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Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H302 + H312,H319

Hazard Classifications

Acute Tox. 4 Dermal - Acute Tox. 4 Oral - Eye Irrit. 2

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Solid-state chemistry of nickel (II)-oxalate-amine systems. Synthesis, characterization and crystal structure of the bis (2, 2'-bipyridine)(oxalato-O, O') nickel (II) tetrahydrate.
Roman P, et al.
Polyhedron, 14(20), 2863-2869 null
EPR and optical absorption studies of vanadyl ions in potassium oxalate monohydrate.
Kripal R, et al.
Physica B: Condensed Matter (Amsterdam, Netherlands), 392(1), 281-287 (2007)
The influence of water on the dispersion of vanadia supported on silica SBA-15: A combined XPS and Raman study.
Hess C, et al.
The Journal of Physical Chemistry C, 111(26), 9471-9479 (2007)
Neutron diffraction refinement of the structure of potassium oxalate monohydrate.
Sequeira A, et al.
Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials, 26(1), 77-80 (1970)
L Sosvorová et al.
Physiological research, 63(4), 521-527 (2014-06-09)
Increased homocysteine levels in serum are typical features of neurodegenerative brain diseases including hydrocephalus. The most frequent therapeutic approach consists of the insertion of a shunt, connecting the brain ventricles to an alternative drainage site. To decide whether the patient

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