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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:
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

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

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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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
A convenient method for preparation of quaternary ammonium salts.
Markowitz M.
The Journal of Organic Chemistry, 22(8), 983-984 (1957)
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)
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