Sodium oxalate
[CAS# 62-76-0]

Identification

• Classification: Organic raw materials >> Carboxylic compounds and derivatives >> Carboxylic esters and their derivatives
• Name: Sodium oxalate
• Synonyms: Disodium oxalate; Oxalic acid disodium salt; Ethanedioic acid sodium salt
• Molecular Formula: Na₂C₂O₄
• Molecular Weight: 134.00
• CAS Registry Number: 62-76-0
• EC Number: 200-550-3
• SMILES: C(=O)(C(=O)[O-])[O-].[Na+].[Na+]

Properties

• Density: 2.34 g/mL
• Melting point: 250-270 ºC
• Boiling point: 450 ºC
• Water solubility: 37 g/L (20 ºC)

Safety Data

• Hazard Symbols: GHS07 Warning
• Hazard Statements: H302-H312
• Precautionary Statements: P264-P270-P280-P301+P317-P302+P352-P317-P321-P330-P362+P364-P501

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Acute toxicity	Acute Tox.	4	H312
Acute toxicity	Acute Tox.	4	H302
Eye irritation	Eye Irrit.	2	H319
Acute toxicity	Acute Tox.	3	H301
Acute toxicity	Acute Tox.	4	H332
Skin irritation	Skin Irrit.	2	H315
Specific target organ toxicity - single exposure	STOT SE	3	H335

• Transport Information: UN 2449;UN 1759

Discovory and Applicatios

Sodium oxalate, with the chemical formula Na2C2O4, is a white, crystalline compound commonly used in various industrial and laboratory applications. It is a salt derived from oxalic acid and is known for its ability to form stable complexes with metal ions. The discovery of sodium oxalate can be traced back to the early 19th century when chemists began to isolate and study organic acids and their salts. It was first prepared by the neutralization of oxalic acid with sodium carbonate, a process that laid the groundwork for its later applications.

Sodium oxalate is widely utilized in the textile industry, where it serves as a bleaching agent and a mordant in dyeing processes. Its ability to complex with metal ions is particularly useful in binding dyes to fabrics, improving the colorfastness and overall quality of dyed materials. Additionally, sodium oxalate finds application in the food industry as a food additive, where it is employed as an acidity regulator and stabilizer in certain food products.

In the field of chemistry, sodium oxalate is often used as a primary standard for determining the concentration of alkaline solutions in titrations. Its stable and well-defined properties make it an ideal candidate for use in analytical chemistry, particularly in laboratories focusing on quantitative analysis. The compound can also be used in the preparation of other oxalate salts, which have their own specific applications in various chemical processes.

Moreover, sodium oxalate has been studied for its potential role in various biological systems. Research has indicated that sodium oxalate can act as a chelating agent, binding to calcium ions and affecting calcium metabolism in biological organisms. This property has implications for both environmental science and medicine, particularly concerning calcium-related disorders and the behavior of heavy metals in ecological systems.

Despite its usefulness, sodium oxalate must be handled with care due to its toxicity. Ingestion of large amounts can lead to oxalate poisoning, characterized by symptoms such as nausea, vomiting, and abdominal pain. This necessitates the establishment of safety guidelines and regulations concerning its use, particularly in industrial settings and laboratories.

In conclusion, sodium oxalate is a versatile chemical compound with a rich history and a wide range of applications in textiles, food processing, and analytical chemistry. Its ability to form complexes with metal ions, along with its utility as a primary standard in titrations, underscores its importance in various scientific and industrial fields. Ongoing research continues to explore its role in biological systems and its potential environmental impacts.