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71800

Sigma-Aldrich

Sodium oxalate

puriss. p.a., ACS reagent, ≥99.5% (RT)

Synonym(s):

Ethanedioic acid sodium salt, Oxalic acid disodium salt

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About This Item

Linear Formula:
NaOOCCOONa
CAS Number:
62-76-0
Molecular Weight:
134.00
Beilstein:
3631622
EC Number:
200-550-3
MDL number:
MFCD00012465
UNSPSC Code:
12352300
eCl@ss:
39021701
PubChem Substance ID:
329763542
NACRES:
NB.24

grade

ACS reagent
puriss. p.a.

Assay

≥99.5% (RT)

form

powder or crystals

impurities

≤0.002% ammonium (NH4)

loss

≤0.01% loss on drying, 105 °C

pH

7-8.5 (25 °C, 2.5% in H2O)

anion traces

chloride (Cl-): ≤20 mg/kg
sulfate (SO42-): ≤20 mg/kg

cation traces

Ca: ≤100 mg/kg
Cd: ≤10 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤10 mg/kg
K: ≤50 mg/kg
Mg: ≤10 mg/kg
Mn: ≤50 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg

SMILES string

[Na+].[Na+].[O-]C(=O)C([O-])=O

InChI

1S/C2H2O4.2Na/c3-1(4)2(5)6;;/h(H,3,4)(H,5,6);;/q;2*+1/p-2

InChI key

ZNCPFRVNHGOPAG-UHFFFAOYSA-L

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General description

Sodium oxalate is a sodium salt of oxalic acid consisting of sodium and oxalate ions. It is used as a reducing agent in chemical synthesis. Additionally, it also acts as a surface modifier and a desulfurizing agent.

Application

Sodium oxalate can be used as a stabilizer in the determination of L-ascorbic acid in vitamin C products by the ultraviolet spectrophotometric method. It is also used in the synthesis of copper oxalate nanoparticles by electrolysis of copper plate as anode.

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H302 + H312

Hazard Classifications

Acute Tox. 4 Dermal - Acute Tox. 4 Oral

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Lars Poulsen et al.
PloS one, 7(12), e50596-e50596 (2012-12-20)
Acid formation in Aspergillus niger is known to be subjected to tight regulation, and the acid production profiles are fine-tuned to respond to the ambient pH. Based on transcriptome data, putative trans-acting pH responding transcription factors were listed and through
F Debela et al.
Journal of environmental management, 116, 156-162 (2013-01-15)
Pyromorphite (PY) and some zinc phosphates (Zn-P) are very sparingly soluble minerals and hence can immobilize Pb and Zn in contaminated soils. However, mechanisms leading to the poor efficiency of PY and Zn-P formation in contaminated soils amended with P
Peiyan Li et al.
Food chemistry, 142, 72-78 (2013-09-05)
Effects of oxalic acid on chilling injury, proline metabolism and energy status in mango fruit were investigated after mango fruit (Mangifera indica L. cv. Zill) were dipped in 5mM oxalic acid solution for 10min at 25°C and then stored at
Jiří Jan et al.
Water research, 47(2), 547-557 (2012-12-12)
Correct identification of P forms together with their main Fe and Al binding partners in non-calcareous sediments is of crucial importance for evaluation of P cycling in water bodies. In this paper, we assess extraction methods frequently used for this
Hong-Joo Lee et al.
Bioresource technology, 130, 211-217 (2013-01-12)
The present study investigated the feasibility of the recovery and reuse oxalic acid in a multistage process for the pretreatment of a lignocellulosic biomass. Electrodialysis (ED), an electrochemical process using ion exchange membranes, was used to recover and reuse oxalic
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