241172

Sigma-Aldrich

Oxalic acid

ReagentPlus®, ≥99%

Linear Formula:
HO2CCO2H
CAS Number:
Molecular Weight:
90.03
Beilstein/REAXYS Number:
385686
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.22
Pricing and availability is not currently available.

vapor density

4.4 (vs air)

Quality Level

vapor pressure

<0.01 mmHg ( 20 °C)

product line

ReagentPlus®

assay

≥99%

form

powder or crystals

mp

189.5 °C (dec.) (lit.)

solubility

water: soluble ~108 g/L at 25 °C

density

1.65 g/cm3 at 18.5 °C

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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General description

Oxalic acid is present as potential impurity in some active pharmaceutical ingredients.

Application

Oxalic acid may be used as a catalyst to synthesize:
  • 2-aryl-1-arylmethyl-1H-benzimidazoles from o-phenylenediamine and aldehydes
  • 2-aryl-4,5-diphenyl-1H-imidazoles from benzyl/benzoin, ammonium acetate and aromatic aldehydes
  • bis-compounds of indole and 2-naphthol in an aqueous medium

Oxalic acid was used:
  • in the synthesis of hemicellulose hydrolysates of yellow poplars
  • in the synthesis of three-dimensionally ordered macroporous metal oxides or carbonates via templating with polystyrene spheres
  • as supporting electrolyte in the electrochemical synthesis of polyaniline-polypyrrole composite coatings

Packaging

50 g in poly bottle

Legal Information

ReagentPlus is a registered trademark of Sigma-Aldrich Co. LLC

Pictograms

CorrosionExclamation mark

Signal Word

Danger

Hazard Statements

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

Hazard Codes

Xn

Risk Statement

21/22-41

Safety Statement

26-36-37-39

RIDADR

NONH for all modes of transport

WGK Germany

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Ly Thi Phi Trinh et al.
Bioresource technology, 161, 280-287 (2014-04-10)
An integrated detoxification process with electrodialysis (ED) followed by adsorption was performed to remove fermentation inhibitors from hemicellulose hydrolysates. The hydrolysates were prepared by oxalic acid pretreatment of yellow poplars at different temperatures. Of fermentation inhibitors, acetic acid showed high...
Oxalic acid as a catalyst for efficient synthesis of bis-(indolyl) methanes, and 14-aryl-14H-dibenzo [a, j] xanthenes in water
Kokare ND, et al.
Chinese Chemical Letters = Zhongguo Hua Xue Kuai Bao, 19(10), 1186-1189 (2008)
Characterization of polyaniline?polypyrrole composite coatings on low carbon steel: a XPS and infrared spectroscopy study.
Applied Surface Science, 218(1), 58-69 (2003)
One-pot efficient synthesis of 2-aryl-1-arylmethyl-1H-benzimidazoles and 2, 4, 5-triaryl-1H-imidazoles using oxalic acid catalyst
Kokare ND, et al.
Synthesis, 2007(18), 2829-2834 (2007)
Dorin Harpaz et al.
Diagnostics (Basel, Switzerland), 10(1) (2020-01-16)
Abstract: Paper-based colorimetric biosensors combine the use of paper with colorimetric signal detection. However, they usually demonstrate lower sensitivities because a signal amplification procedure has not been used. Stopping the reaction of colorimetric signal generation is often used in lab-based...
Articles
In many technologies, performance requirements drive device dimensions below the scale of electron mean free paths (λe). This trend has increased scientific interest and technological importance of electrical resistivities at the nanoscale.
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