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33506

Sigma-Aldrich

Oxalic acid dihydrate

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

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:
3679436
EC Number:
205-634-3
MDL number:
MFCD00149102
UNSPSC Code:
12352100
eCl@ss:
39021701
PubChem Substance ID:
57648855
NACRES:
NA.21

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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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.

Application

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

Pictograms

CorrosionExclamation mark
GHS05,GHS07

Signal Word

Danger

Hazard Statements

H302 + H312,H318

Hazard Classifications

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

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

ISHL Indicated Name

Substances Subject to be Indicated Names

ISHL Notified Names

Substances Subject to be Notified Names

JAN Code

33506-6X1KG:4548173258195
33506-VAR:
33506-5KG:4548173258188
33506-6X250G:4548173258201
33506-1KG:4548173258133
33506-6X5KG:4548173258225
33506-6X500G:4548173258218
33506-BULK:
33506-250G:4548173258140
33506-1.5KG:4548173258126
33506-4X5KG:4548173258164
33506-500G:4548173258171
33506-25KG:4548173258157

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Certificates of Analysis (COA)

Lot/Batch Number
BCCL4245
BCCM4256
BCCK9057
BCCK9056
BCCK0473

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Griffin RG, et al.
J. Chem. Phys. , 63(3), 1267-1271 (1975)
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