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75688

Sigma-Aldrich

Oxalic acid

puriss. p.a., anhydrous, ≥99.0% (RT)

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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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1 of 4

This Item
6585378.16144194131
Oxalic acid puriss. p.a., anhydrous, &#8805;99.0% (RT)

Sigma-Aldrich

75688

Oxalic acid

Oxalic acid purified grade, 99.999% trace metals basis

Sigma-Aldrich

658537

Oxalic acid

Oxalic acid anhydrous for synthesis

Sigma-Aldrich

8.16144

Oxalic acid

Oxalic acid 98%

Sigma-Aldrich

194131

Oxalic acid

vapor density

4.4 (vs air)

vapor density

4.4 (vs air)

vapor density

-

vapor density

4.4 (vs air)

vapor pressure

<0.01 mmHg ( 20 °C)

vapor pressure

<0.01 mmHg ( 20 °C)

vapor pressure

<1 Pa ( 25 °C)

vapor pressure

<0.01 mmHg ( 20 °C)

assay

≥99.0% (RT)

assay

99.999% trace metals basis

assay

≥99% (manganometric)

assay

98%

form

crystals

form

powder or crystals

form

solid

form

powder or crystals

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

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Eagleson M.
Concise Encyclopedia Chemistry, 66-66 (1994)
Eagleson M.
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Eagleson M.
Concise Encyclopedia Chemistry, 889-889 (1994)
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