Sodium oxalate is a common oxalate with the chemical formula of Na2C2O4. It is a white crystalline powder with a density of 1.9 1g/cm3, a melting point of 250-260℃ and a boiling point of 160℃. Sodium oxalate is easily soluble in water and its aqueous solution is alkaline.

Sodium oxalate is used as catalyst, buffer and antioxidant in many chemical reactions. It can stably maintain high alkalinity in aqueous solution, making sodium oxalate an ideal catalyst for some chemical reactions. In addition, sodium oxalate is also widely used in dye, medicine, pesticide and other fields.

Sodium oxalate is a commonly used titrant in analytical chemistry. It is mainly used to determine metal ions, such as calcium, magnesium, manganese and copper. Sodium oxalate reacts with these metal ions to form water-soluble complexes, and the content of metal ions can be calculated by titration of the concentration of the complexes in the solution.

In the field of biology, sodium oxalate has the functions of adjusting pH value and acting as a penetrating agent. Oxalic acid is an effective antimetabolite in plant cells, which can inhibit plant growth. As a salt of oxalic acid, sodium oxalate can neutralize oxalic acid in plant cells, thus reducing its inhibitory effect on plant growth. In addition, sodium oxalate can also be used as a penetrating agent in plant cells to help plants absorb water and nutrients.

In the industrial field, sodium oxalate is mainly used to synthesize other oxalates, such as calcium oxalate and zinc oxalate. These oxalates have excellent properties and wide applications. For example, calcium oxalate can be used to make products such as ceramics and glass, and zinc oxalate can be used to make zinc compounds and catalysts.

Sodium oxalate is an important compound and widely used in many fields.

Its relative molecular mass is 134, which is white crystalline powder and easily soluble in water and alkali. It can be used as catalyst, buffer and antioxidant in chemical reactions; Used for titration of metal ions in analytical chemistry; In biology, it has the function of adjusting pH value and acting as a penetrant. In the industrial field, it is mainly used to synthesize other oxalates. In addition, sodium oxalate can also be used to prepare high-purity oxalic acid and as a precursor to prepare some special materials.

Pay attention to safety when storing and using sodium oxalate. Although the toxicity of sodium oxalate is relatively low, long-term or large-area contact may still have certain effects on human body. Therefore, it is recommended to use it under the guidance of professionals and pay attention to protecting personal safety and health.