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33506 Sigma-Aldrich

Oxalic acid dihydrate

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

Synonym: Ethanedioic acid dihydrate

  • CAS Number 6153-56-6

  • Linear Formula HO2CCO2H · 2H2O

  • Molecular Weight 126.07

  •  Beilstein Registry Number 3679436

  •  EC Number 205-634-3

  •  MDL number MFCD00149102

  •  PubChem Substance ID 57648855

  •  eCl@ss 39021701

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Properties

Related Categories Acids, Acids & Bases, Analytical Reagents, Analytical Reagents for General Use, Analytical/Chromatography,
grade   ACS reagent, reag. ISO, reag. Ph. Eur.
vapor density   4.4 (vs air)
vapor pressure   <0.01 mmHg ( 20 °C)
InChI Key   GEVPUGOOGXGPIO-UHFFFAOYSA-N
grade   puriss. p.a.
assay   ≥99.5% (manganometric)
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)

Description

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.

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.

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Safety & Documentation

Safety Information

Symbol 
Signal word 
Danger
Hazard statements 
Precautionary statements 
Personal Protective Equipment 
RIDADR 
NONH for all modes of transport
WGK Germany 
1
Protocols & Articles

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