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Sigma-Aldrich

Oxalic acid

puriss. p.a., anhydrous, ≥99.0% (RT)

Synonym(s):

Ethanedioic acid

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50 G
$61.40
250 G
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About This Item

Linear Formula:
HO2CCO2H
CAS Number:
144-62-7
Molecular Weight:
90.03
Beilstein/REAXYS Number:
385686
EC Number:
205-634-3
MDL number:
MFCD00002573
UNSPSC Code:
12352100
PubChem Substance ID:
57652581
NACRES:
NA.21

$61.40

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grade

anhydrous
puriss. p.a.

Quality Level

200

vapor density

4.4 (vs air)

vapor pressure

<0.01 mmHg ( 20 °C)

assay

≥99.0% (RT)

form

crystals

impurities

≤0.001% total nitrogen (N)
≤1% water

ign. residue

≤0.01% (as SO4)

mp

189.5 °C (dec.) (lit.)

anion traces

chloride (Cl-): ≤50 mg/kg
sulfate (SO42-): ≤350 mg/kg

cation traces

Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤35 mg/kg
K: ≤50 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Na: ≤50 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg

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. It reacts with aqueous iron(II) salt solutions to afford iron(III) oxalate.[1]

Application

Oxalic acid may be used in the preparation of the following:
  • ammonium oxalate[2]
  • calcium oxalate[3]
  • chlorine dioxide (ClO2)[4]
  • potassium hydrogenoxalate[5]

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_germany

WGK 1

ppe

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
BCCM7728
BCCM3056
BCCL8741
BCCL8740
BCCK4763

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Concise Encyclopedia Chemistry, 889-889 (1994)
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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

1–2 of 2 Questions  

  1. 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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  2. 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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