Anhydrous Magnesium Chloride Vs. Hexahydrate Magnesium Chloride

Magnesium chloride is a summary name of anhydrous magnesium chloride and its various hydrates. 

1. Differences in production process ①.Magnesium chloride hexahydrate is the mother liquor after bromine production (bromine mother liquor is an unsaturated aqueous solution of magnesium chloride), and then evaporated and concentrated (normal pressure evaporation and reduced pressure evaporation are usually used), and finally hexahydrate is obtained Magnesium chloride products; ②. Magnesium chloride Anhydrous can be made from a mixture of ammonium chloride and magnesium chloride hexahydrate, or a double salt of ammonium chloride and magnesium chloride hexahydrate dehydrated in a hydrogen chloride stream. 

2. Molecular formula difference ①. Magnesium chloride hexahydrate has six crystal waters, the molecular formula is MgCl2.6H2O; ②. Anhydrous magnesium chloride does not contain crystal water, and its molecular formula is MgCl2. 

3. Appearance difference ①. Magnesium chloride hexahydrate is white to brown flakes or colorless crystals, which are often called halogen flakes, halogen grains, halogen blocks, etc. in the industry; magnesium chloride hexahydrate flakes are thicker than anhydrous magnesium chloride flakes. ②. Anhydrous magnesium chloride is a white shiny hexagonal crystal, which is often called halogen powder in the industry. 

4. Deliquescent difference ①. Magnesium chloride hexahydrate is easy to deliquescence in humid air; ②. The deliquescence of anhydrous magnesium chloride is higher than that of magnesium chloride hexahydrate, and the deliquescent speed is relatively slower. 

5. Different Uses ①. Magnesium chloride hexahydrate can be used in food industry, building materials industry, cement industry, deicing agent, desiccant, animal husbandry and aquaculture, pulping, magnesium fertilizer, sewage treatment, etc.; ②. Anhydrous magnesium chloride is mainly used in metallurgy, light industry, coal, construction, chemical and other industries.