Trisodium citrate dihydrate, also known as sodium citrate, is an organic compound that has white to colorless crystals. Odourless, with a cool salty taste. Stable in room temperature and air, slightly soluble in wet air, weathering in hot air. Lose crystal water heated to 150 ℃. It is easily soluble in water, glycerol, alcohol and other organic solvents. It is decomposed by overheating, slightly deliviate in humid environment and slightly weathering in hot air.

Sodium citrate is used as acidity regulator, flavor agent and stabilizer in food and beverage industry. Used as an anticoagulant, phlegm dispersant and diuretic in the pharmaceutical industry; In detergent industry, sodium tripolyphosphate can be substituted as non-toxic detergent additive. It is also used in brewing, injection, photographic medicine and electroplating.