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75688

Sigma-Aldrich

Oxalic acid

puriss. p.a., anhydrous, ≥99.0% (RT)

Synonym(s):
Ethanedioic acid
Linear Formula:
HO2CCO2H
CAS Number:
Molecular Weight:
90.03
Beilstein:
385686
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

grade

anhydrous
puriss. p.a.

Quality Level

vapor density

4.4 (vs air)

vapor pressure

<0.01 mmHg ( 20 °C)

Assay

≥99.0% (RT)

form

crystals

impurities

≤0.001% total nitrogen (N)
≤1% water

ign. residue

≤0.01% (as SO4)

mp

189.5 °C (dec.) (lit.)

anion traces

chloride (Cl-): ≤50 mg/kg
sulfate (SO42-): ≤350 mg/kg

cation traces

Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤35 mg/kg
K: ≤50 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Na: ≤50 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg

SMILES string

OC(=O)C(O)=O

InChI

1S/C2H2O4/c3-1(4)2(5)6/h(H,3,4)(H,5,6)

InChI key

MUBZPKHOEPUJKR-UHFFFAOYSA-N

Gene Information

human ... SRC(6714)

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Oxalic acid

grade

anhydrous, puriss. p.a.

grade

purified grade

grade

-

grade

-

vapor density

4.4 (vs air)

vapor density

4.4 (vs air)

vapor density

4.4 (vs air)

vapor density

-

vapor pressure

<0.01 mmHg ( 20 °C)

vapor pressure

<0.01 mmHg ( 20 °C)

vapor pressure

<0.01 mmHg ( 20 °C)

vapor pressure

<1 Pa ( 25 °C)

assay

≥99.0% (RT)

assay

99.999% trace metals basis

assay

≥99%

assay

≥99% (manganometric)

form

crystals

form

powder or crystals

form

powder or crystals

form

solid

impurities

≤0.001% total nitrogen (N), ≤1% water

impurities

-

impurities

-

impurities

-

General description

Oxalic acid is a dicarboxylic acid. It reacts with aqueous iron(II) salt solutions to afford iron(III) oxalate.

Application

Oxalic acid may be used in the preparation of the following:
  • ammonium oxalate
  • calcium oxalate
  • chlorine dioxide (ClO2)
  • potassium hydrogenoxalate

Pictograms

CorrosionExclamation mark

Signal Word

Danger

Hazard Statements

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

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

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