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Sigma-Aldrich

Ammonium oxalate monohydrate

puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., 99.5-101.0%

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Synonym(s):
Oxalic acid diammonium salt
Linear Formula:
(NH4)2C2O4 · H2O
CAS Number:
6009-70-7
Molecular Weight:
142.11
Beilstein:
3759830
EC Number:
238-135-4
MDL number:
MFCD00149694
PubChem Substance ID:
329754130
NACRES:
NA.21

grade

ACS reagent
puriss. p.a.

Quality Level

100

Agency

USP/NF
reag. ISO
reag. Ph. Eur.

vapor pressure

<0.1 hPa ( 20 °C)

Assay

99.5-101.0%

form

crystalline

impurities

≤0.005% in water insoluble matters

ign. residue

≤0.02% (as SO4)

pH

6-7 (20 °C, 2.5%)

mp

133 °C (dec.) (lit.)

anion traces

chloride (Cl-): ≤5 mg/kg
nitrate (NO3-): ≤5 mg/kg
sulfate (SO42-): ≤20 mg/kg

cation traces

Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤2 mg/kg
K: ≤10 mg/kg
Mg: ≤10 mg/kg
Na: ≤10 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg

SMILES string

OC(C(O)=O)=O.N.O.N

InChI

1S/C2H2O4.2H3N.H2O/c3-1(4)2(5)6;;;/h(H,3,4)(H,5,6);2*1H3;1H2

InChI key

MSMNVXKYCPHLLN-UHFFFAOYSA-N

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General description

Ammonium oxalate monohydrate is the diammonium salt of oxalic acid. Its refined crystal structure has been investigated by three-dimensional diffraction studies. Influence of bivalent [Mn(II), Co(II), Ni(II)] and trivalent cations [Fe(III), Cr(III)] impurities on the growth rates of ammonium oxalate monohydrate crystals has been described. Its space group and unit cell parameters have been analyzed by neutron diffraction studies. Its IR spectra has been compared with that of isolated coal-solubilizing agent (CSA).

Application

Ammonium oxalate monohydrate may be used to prepare an electrochemiluminescence (ECL) solution containing 1mM tris(2,2-bipyridyl)ruthenium(II) (Ru(bpy)32+) and 0.2mM ammonium oxalate monohydrate in a 0.1M ammonium acetate buffer at pH 5.0.

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H302 - H319

Hazard Classifications

Acute Tox. 4 Oral - Eye Irrit. 2

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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Neutron diffraction study of ammonium oxalate monohydrate,(NH4)2C2O4.H2O.
Padmanabhan VM, et al.
Acta Crystallographica, 18(3), 567-568 (1965)
Effect of impurities on metastable zone width for the growth of ammonium oxalate monohydrate crystals from aqueous solutions.
Sangwal K and Mielniczek-Brzoska E.
Journal of Crystal Growth, 267(3), 662-675 (2004)
Ammonium oxalate monohydrate: structure refinement at 30K.
Robertson JH.
Acta Crystallographica, 18(3), 410-417 (1965)
M S Cohen et al.
Applied and environmental microbiology, 56(11), 3285-3291 (1990-11-01)
Low-ranked coals were dissolved by using cell extracts derived from liquid cultures of Trametes versicolor. The coal-solubilizing agent (CSA) was separated from the broth components by a multistep isolation procedure including reverse-phase high-pressure liquid chromatography, size exclusion chromatography, ethanol fractionation
Electrochemiluminescence as a tool for microscopy at the nanoscale.
Lee A, et al.
Proceedings of SPIE, 13, 13-20 (2004)

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