There are differences between citric acid monohydrate and anhydrous citric acid in application fields, chemical properties and physical properties. Citric acid monohydrate is mainly used in food, beverage, chemical and cosmetic industries. It is unstable after high temperature, while citric acid anhydrous Mainly used in the manufacture of chemicals, it has weathering and deliquescent properties, and the density and melting point of the two are also different.

1. Application field

Citric acid monohydrate is mainly used in the food and beverage industries. It can be used as a sour agent, flavoring agent, preservative, and preservative. It can also be used as an antioxidant, plasticizer, and detergent in the chemical and cosmetic industries. Anhydrous lemon Acid can also be used in the food and beverage industries, but the most used sector is chemical manufacturing.

2. Chemical properties

Citric acid monohydrate may ignite and explode when exposed to open flames, high heat or in contact with oxidants. It is unstable when exposed to high temperatures. Anhydrous citric acid is weathering in a dry environment, and deliquescent in a humid environment. When the temperature is above 175°C, water and carbon dioxide will be released, and the chemical stability is poor.

3. Physical properties

The relative density of citric acid monohydrate is 1.542, the melting point is 153°C, the refractive index is 1.493-1.509, the crystallization critical temperature of the solution is 36.6°C, the density of anhydrous citric acid is 1.54, the melting point is 135-152°C, flashing The point is 173.9, and the water solubility is 1630g/L. The physical properties of the two are obviously different. Pay attention to the distinction when using.