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33506

Oxalic acid dihydrate

ACS reagent grade, ≥99.5% (manganometric), crystals, puriss. p.a., reag. ISO, reag. Ph. Eur.

Synonym(s):

Ethanedioic acid dihydrate

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About This Item

Linear Formula:
HO2CCO2H · 2H2O
CAS Number:
6153-56-6
Molecular Weight:
126.07
Beilstein/REAXYS Number:
3679436
EC Number:
205-634-3
MDL number:
MFCD00149102
UNSPSC Code:
12352100
eCl@ss:
39021701
PubChem Substance ID:
57648855
NACRES:
NA.21

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Product Name

Oxalic acid dihydrate, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99.5% (manganometric)

grade

ACS reagent
puriss. p.a.

Quality Level

200

agency

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

vapor density

4.4 (vs air)

vapor pressure

<0.01 mmHg ( 20 °C)

assay

≥99.5% (manganometric)

form

crystals

impurities

foreign organic matter, in accordance
≤0.001% total nitrogen (N)

ign. residue

≤0.01% (as SO4)

mp

104-106 °C (lit.)

anion traces

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

cation traces

Ca: ≤5 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤2 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg
heavy metals: ≤5 ppm (by ICP-OES)

functional group

carboxylic acid

SMILES string

[H]O[H].[H]O[H].OC(=O)C(O)=O

InChI

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

InChI key

GEVPUGOOGXGPIO-UHFFFAOYSA-N

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This Item
O03761.930188.18242
Oxalic acid dihydrate puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., &#8805;99.5% (manganometric)

Sigma-Aldrich

33506

Oxalic acid dihydrate

Oxalic acid dihydrate ReagentPlus&#174;, &#8805;99.0% (GC)

Sigma-Aldrich

O0376

Oxalic acid dihydrate

Oxalic acid dihydrate for analysis EMPARTA&#174; ACS

Supelco

1.93018

Oxalic acid dihydrate

Oxalic acid dihydrate for synthesis

Sigma-Aldrich

8.18242

Oxalic acid dihydrate

grade

ACS reagent, puriss. p.a.

grade

-

grade

ACS reagent

grade

-

assay

≥99.5% (manganometric)

assay

≥99.0% (GC)

assay

-

assay

≥99% (manganometric)

agency

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

agency

-

agency

-

agency

-

Quality Level

200

Quality Level

200

Quality Level

-

Quality Level

200

form

crystals

form

-

form

-

form

solid

vapor pressure

<0.01 mmHg ( 20 °C)

vapor pressure

<0.01 mmHg ( 20 °C)

vapor pressure

-

vapor pressure

0.000312 hPa ( 25 °C)

General description

Oxalic acid dihydrate crystals are monoclinic and exhibit a space group P21/n. Each unit cell contains two molecules. 13C chemical shielding tensors in oxalic acid dihydrate have been evaluated.[1]

Application

Oxalic acid dihydrate has been used to prepare oxalate precursor, which was employed for the synthesis of zinc oxide nanopowders.[2] It may be used to prepare the 0.01M solution of oxalic acid, which was employed in the mobile phase in liquid chromatographic studies.[3]

pictograms

CorrosionExclamation mark
GHS05,GHS07

signalword

Danger

Hazard Classifications

Acute Tox. 4 Dermal - Acute Tox. 4 Oral - Eye Dam. 1

Storage Class

11 - Combustible Solids

wgk_germany

WGK 1

ppe

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
BCCP0086
BCCL4245
BCCM4256
BCCK9057
BCCK9056

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The effect of the rate of precursor production on the purity and aggregation morphology of nanoparticulate zinc oxide.
Duffy GM, et al.
Journal of Materials Chemistry, 17(2), 181-184 (2007)
13C chemical shielding in oxalic acid, oxalic acid dihydrate, and diammonium oxalate.
Griffin RG, et al.
J. Chem. Phys. , 63(3), 1267-1271 (1975)
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