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221716

Sigma-Aldrich

Ammonium oxalate monohydrate

ACS reagent, ≥99%

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Synonym(s):
Oxalic acid diammonium salt
Linear Formula:
(NH4)2C2O4 · H2O
CAS Number:
Molecular Weight:
142.11
Beilstein/REAXYS Number:
3759830
EC Number:
MDL number:
PubChem Substance ID:
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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1 of 4

This Item
32304379743223425
vibrant-m

221716

Ammonium oxalate monohydrate

Essential Grade
vibrant-m

32304

Ammonium oxalate monohydrate

Essential Grade
vibrant-m

379743

Ammonium oxalate monohydrate

-
vibrant-m

223425

Potassium oxalate monohydrate

Essential Grade
form

crystals or granules, crystalline powder

form

crystalline

form

powder

form

crystals or chunks

Quality Level

200

Quality Level

100

Quality Level

100

Quality Level

200

impurities

≤0.005% insolubles

impurities

≤0.005% in water insoluble matters

impurities

≤100.0 ppm Trace Metal Analysis

impurities

H2SO4, passes test (darkened), ≤0.01% insolubles

mp

133 °C (dec.) (lit.)

mp

133 °C (dec.) (lit.)

mp

133 °C (dec.) (lit.)

mp

-

grade

ACS reagent

grade

ACS reagent, puriss. p.a.

grade

-

grade

ACS reagent

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.

related product

Product No.
Description
Pricing

pictograms

Exclamation mark

signalword

Warning

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


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