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Sigma-Aldrich

Oxalic acid

98%

Synonym(s):

Ethanedioic acid

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About This Item

Linear Formula:
HO2CCO2H
CAS Number:
144-62-7
Molecular Weight:
90.03
Beilstein:
385686
EC Number:
205-634-3
MDL number:
MFCD00002573
UNSPSC Code:
12352100
PubChem Substance ID:
24851633
NACRES:
NA.22
Pricing and availability is not currently available.

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)

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General description

Oxalic acid is a dicarboxylic acid used in dehydration, elimination, protection, deprotection, condensation, and decarboxylation reactions.[1]

Oxalic acid is present as a potential impurity in some active pharmaceutical ingredients[2].

Application

Oxalic acid was used in determination of oxamic acid, oxalic acid, and oxamide in hydrophobic drug substance matrix by ion-exclusion chromatography[2]. It was used in the synthesis of three-dimensionally ordered macroporous metal oxides or carbonates via templating with polystyrene spheres[3]. It was employed as supporting electrolyte during electrochemical synthesis of polyaniline-polypyrrole composite coatings[4].

Pictograms

CorrosionExclamation mark
GHS05,GHS07

Signal Word

Danger

Hazard Statements

H302 + H312,H318

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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Certificates of Analysis (COA)

Lot/Batch Number
BCCL3258
BCCM3697
BCCL9775
BCCK9000
BCCK2702

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Oxalic Acid
Hamilton GS
eEROS (Encyclopedia of Reagents for Organic Synthesis) (2001)
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)
Xianlai Zeng et al.
Journal of hazardous materials, 295, 112-118 (2015-04-22)
With the booming of consumer electronics (CE) and electric vehicle (EV), a large number of spent lithium-ion battery (LIBs) have been generated worldwide. Resource depletion and environmental concern driven from the sustainable industry of CE and EV have motivated spent
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Questions

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  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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