Sodium citrate is mainly citrate, which is produced by fermentation of starchy substances, combined with alkaline substances to produce a safe and non-toxic effect. Sodium citrate is not harmful to the human body, often used as a buffer. Bacterial culture medium in medicine can be used for diuretic, expectorant, sweating, to prevent blood coagulation; can also be used in food additives, in carbonated beverages will be added with sodium citrate.

Sodium citrate, also known as sodium citrate, chemical formula for C6H5Na3O7, molecular weight of 258.07, is an organic compound, colorless rhomboid columnar crystals, stable in air, soluble in water and glycerol, slightly soluble in ethanol. The aqueous solution is slightly alkaline and tastes cool. When heated to 100℃, it becomes dihydrate salt. Commonly used as a buffer, complexing agent, bacterial culture medium, in medicine for diuretic, expectorant, sweating, to prevent blood coagulation, and used in food, beverages, electroplating, photography and so on.