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Sodium oxalate CAS 62-76-0 Oxalic acid disodium salt Ethanedioic acid sodium salt 

Payment Terms: T/T,L/C,WU 
Place of Origin: Sichuan, China (Mainland) 
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Product Detail

Model No.: Na2C2O4
Production Capacity: 100000T/Year
Delivery Date: within 7 days
Brand: MOSINTER
Density: 2.34 g cm-3
Melting point: 260 °C (500 °F; 533 K) deco...
Means of Transport: Ocean,Land,Air
Packing: According to the customer r...
CAS: 62-76-0
Molecular formula: Na2C2O4
Molar mass: 133.999 g/mol
Alias: Disodium oxalate

THIS IS TO CERTIFY THAT WE, THE UNDERSIGNED, HAVE INSPECTED THE QUALITY OF THE ABOVE MENTIONED GOODS AND FOUND THE RESULT OF INSPECTION AS FOLLOWS:

Sodium oxalate (CAS: 62-76-0)

 

Item

Index

Appearance

white or colorless crystals

Purity %≥

99.8

Chloride (Cl) %≤

0.002

Potassium (K) %≤

0.01

Total nitrogen (N) %≤

0.002

Iron (Fe) %≤

0.0005

Sulfate (SO4)   %≤

0.004

Water insoluble %≤

0.01

Loss on drying %≤

0.02

PH

7.5-8.5

Heavy metals (as Pb) %≤

0.002

Basic Information


Sodium oxalate, or disodium oxalate, is the sodium salt of oxalic acid with the formula Na2C2O4. It is usually a white, crystalline, odorless powder, that decomposes at 250–270 °C.

Disodium oxalate can act as a reducing agent, and it may be used as a primary standard for standardizing potassium permanganate (KMnO4) solutions.

The mineral form of sodium oxalate is natroxalate. It is only very rarely found and restricted to extremely sodic conditions of ultra-alkalinepegmatites.

Preparation

Sodium oxalate can be prepared through the neutralization of oxalic acid with sodium hydroxide (NaOH) in a 1:2 acid-to-base molar ratio. Half-neutralization can be accomplished with NaOH in a 1:1 ratio which produces NaHC2O4, monobasic sodium oxalate or sodium hydrogenoxalate.

Alternatively, it can be produced by decomposing sodium formate by heating it at a temperature exceeding 360 °C.

Reactions

Sodium oxalate is used to standardize potassium permanganate solutions. It is desirable that the temperature of the titration mixture is greater than 60 °C to ensure that all the permanganate added reacts quickly. The kinetics of the reaction is complex, and the manganese(II) ions formed catalyze the further reaction between permanganate and oxalic acid (formed in situ by the addition of excess sulfuric acid). The final equation is as follows:

5Na2C2O4 + 2KMnO4 + 8H2SO4 → K2SO4 + 5Na2SO4 + 2MnSO4 + 10CO2 + 8H2O

Biological activity

Like several other oxalates, sodium oxalate is toxic to humans. It can cause burning pain in the mouth, throat and stomach, bloody vomiting, headache, muscle cramps, cramps and convulsions, drop in blood pressure, heart failure, shock, coma, and possible death. Mean lethal dose by ingestion of oxalates is 10-15 grams (per MSDS).

Sodium oxalate, like citrates, can also be used to remove calcium ions (Ca2+) from blood plasma. It also prevents blood from clotting. Note that by removing calcium ions from the blood, sodium oxalate can impair brain function, and deposit calcium oxalate in the kidneys.

Storage

Sealing dry preservation.


 


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MOSINTER GROUP LIMITED [China (Mainland)]

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Business Type:Manufacturer, Trading Company
City: Ningbo
Province/State: Zhejiang
Country/Region: China (Mainland)

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