Skip to Content
Merck

Key Documents

View All Documentation

194131

Oxalic acid

98%

Synonym(s):

Ethanedioic acid

Sign In to View Organizational & Contract Pricing.

Select a Size

Change View

About This Item

Linear Formula:
HO2CCO2H
CAS Number:
144-62-7
Molecular Weight:
90.03
UNSPSC Code:
12352100
NACRES:
NA.22
PubChem Substance ID:
24851633
EC Number:
205-634-3
Beilstein/REAXYS Number:
385686
MDL number:
MFCD00002573
Assay:
98%
Form:
powder or crystals
Technical Service
Need help? Our team of experienced scientists is here for you.
Let Us Assist

vapor density

4.4 (vs air)

Quality Level

200

vapor pressure

<0.01 mmHg ( 20 °C)

assay

98%

form

powder or crystals

pH

(1.3 at 9 g/l)

mp

189.5 °C (dec.) (lit.)

solubility

water: soluble 108 g/L at 25 °C

density

1.65 g/cm3 at 18.5 °C

functional group

carboxylic acid

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)

General description

Oxalic acid is a dicarboxylic acid used in dehydration, elimination, protection, deprotection, condensation, and decarboxylation reactions.

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

Application

Oxalic acid was used in determination of oxamic acid, oxalic acid, and oxamide in hydrophobic drug substance matrix by ion-exclusion chromatography. It was used in the synthesis of three-dimensionally ordered macroporous metal oxides or carbonates via templating with polystyrene spheres. It was employed as supporting electrolyte during electrochemical synthesis of polyaniline-polypyrrole composite coatings.

Still not finding the right product?

Explore all of our products under Oxalic acid

pictograms

CorrosionExclamation mark
GHS05,GHS07

signalword

Danger

Hazard Classifications

Acute Tox. 4 Dermal - Acute Tox. 4 Oral - Eye Dam. 1

Storage Class

11 - Combustible Solids

wgk

WGK 1

ppe

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

Substances Subject to be Indicated Names

ishl_indicated

Substances Subject to be Notified Names

ishl_notified

194131-1KG:4.54817311264E12 + 194131-250G:4.548173112657E12 + 194131-5G:4.548173112664E12

jan

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number
26799MJ
26798MJ
26797MJ
79496JJ
06812PH

Don't see the Right Version?

If you require a particular version, you can look up a specific certificate by the Lot or Batch number.

Search for a COA

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

General synthesis of periodic macroporous solids by templated salt precipitation and chemical conversion.
Yan H, et al.
Chemistry of Materials, 12(4), 1134-1141 (2000)
Characterization of polyaniline-polypyrrole composite coatings on low carbon steel: a XPS and infrared spectroscopy study.
Rajagopalan R and Iroh JO.
Applied Surface Science, 218(1), 58-69 (2003)
L Yang et al.
Journal of pharmaceutical and biomedical analysis, 22(3), 487-493 (2000-04-15)
Oxalic acid, oxamic acid and oxamide are potential impurities in some active pharmaceutical ingredients (API). The retention and separation of oxalic and oxamic acids are particularly challenging using conventional reversed-phase HPLC due to their high polarity. An ion-exclusion chromatography (IEC)
View All Related Papers