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221716

Sigma-Aldrich

Ammonium oxalate monohydrate

ACS reagent, ≥99%

Synonym(s):

Oxalic acid diammonium salt

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About This Item

Linear Formula:
(NH4)2C2O4 · H2O
CAS Number:
6009-70-7
Molecular Weight:
142.11
Beilstein/REAXYS Number:
3759830
EC Number:
238-135-4
MDL number:
MFCD00149694
UNSPSC Code:
12352300
PubChem Substance ID:
329752279
NACRES:
NB.24

grade

ACS reagent

vapor pressure

<0.1 hPa ( 20 °C)

assay

≥99%
99.0-101.0% (ACS specification)

form

crystalline powder
crystals or granules

impurities

≤0.005% insolubles

ign. residue

≤0.02%

pH

6-7 (25 °C, 14.2 g/L)

mp

133 °C (dec.) (lit.)

anion traces

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

cation traces

Fe: ≤2 ppm
heavy metals: ≤5 ppm (by ICP)

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 a 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 have been compared with that of isolated coal-solubilizing agent (CSA).

Application

Ammonium oxalate monohydrate may be used in the preparation of tetramethylammonium oxalate.

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pictograms

Exclamation mark
GHS07

signalword

Warning

hcodes

H302,H319

Hazard Classifications

Acute Tox. 4 Oral - Eye Irrit. 2

Storage Class

13 - Non Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

Certificates of Analysis (COA)

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A convenient method for preparation of quaternary ammonium salts.
Markowitz M.
The Journal of Organic Chemistry, 22(8), 983-984 (1957)
Yeonho Kim et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 26(46), 10510-10518 (2020-03-27)
In this work, environmentally friendly photocatalysts with attractive catalytic properties are reported that have been prepared by introducing SnO2 quantum dots (QDs) directly onto ZnSe(N2 H4 )0.5 substrates to induce advantageous charge separation. The SnO2 /ZnSe(N2 H4 )0.5 nanocomposites could
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
Sina Matavos-Aramyan et al.
Free radical biology & medicine, 106, 158-167 (2017-02-19)
Three novel modified advanced oxidation process systems including ascorbic acid-, pro-oxidants- and ascorbic acid-pro-oxidants-modified Fenton system were utilized to study the disinfection efficiency on Cryptosporidium-contaminated drinking water samples. Different concentrations of divalent and trivalent iron ions, hydrogen peroxide, ascorbic acid
Ammonium oxalate monohydrate: structure refinement at 30K.
Robertson JH.
Acta Crystallographica, 18(3), 410-417 (1965)
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