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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/REAXYS Number 3679436

  •  EC Number 205-634-3

  •  MDL number MFCD00149102

  •  eCl@ss 39021701

  •  PubChem Substance ID 57648855

  •  NACRES NA.21

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Properties

Related Categories Acids, Acids & Bases, Analytical Reagents, Analytical Reagents for General Use, Analytical/Chromatography,
Quality Level   200
grade   ACS reagent, reag. ISO, reag. Ph. Eur.
vapor density   4.4 (vs air)
vapor pressure   <0.01 mmHg ( 20 °C)
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)
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

Description

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.

Safety & Documentation

Safety Information

Symbol 
Signal word 
Danger
Hazard statements 
Precautionary statements 
Personal Protective Equipment 
RIDADR 
NONH for all modes of transport
WGK Germany 
WGK 1
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable

Documents

Certificate of Analysis (COA)

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Protocols & Articles

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Peer-Reviewed Papers
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References

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