Differences in Price, Properties and Classification of Magnesium Chloride

1. Differences Between Anhydrous and Hexahydrate Magnesium Chloride

Anhydrous magnesium chloride and magnesium chloride hexahydrate are both classified as magnesium chloride, but they involve completely different production processes.

1.1 Chemical Composition and Classification

Anhydrous Magnesium Chloride

· Molecular formula: MgCl₂

· Molecular weight: approximately 95.21 g/mol

· No crystal water; extremely strong water absorption

· CAS No.: 7786-30-3

· Melting point: 714℃

· Boiling point: 1412℃

By grade: food grade, industrial grade, pharmaceutical gradeBy form: powder (common), flakes, blocksBy purity: 98%, 99%, 99.5%

Magnesium Chloride Hexahydrate

· Molecular formula: MgCl₂·6H₂O

· Molecular weight: approximately 203.30 g/mol

· Combined with 6 molecules of crystal water

· CAS No.: 7791-18-6

· Relative density: 1.56 g/cm³

· Melting point: 116–118℃

By grade: food grade, industrial grade, pharmaceutical gradeBy form: flakes (cost-effective), granules, powderBy purity: 43%, 44%, 45%, 46% (common), 47%

1.2 Price Difference

Anhydrous magnesium chloride is more expensive than magnesium chloride hexahydrate.

· Magnesium chloride hexahydrate: usually several hundred to low thousand yuan

· Anhydrous magnesium chloride: usually around 2000–10000 yuan

Price differences depend on grade, raw materials, product form, production process and market demand.

1.3 Application Differences

Due to differences in crystal water content and purity, the two products have different application focuses, as shown in the table below:

2. Is Magnesium Chloride Soluble in Water?

Yes, both products are soluble in water.In most applications, both types of magnesium chloride are used after being dissolved in water.Magnesium chloride is naturally hygroscopic, so it dissolves easily when in contact with water.

Airtight storage is required, especially in high-humidity summer conditions to avoid caking.

Yuze Chemical has been engaged in the magnesium chloride industry for 13 years.Our anhydrous magnesium chloride and magnesium chloride hexahydrate have a relatively low caking rate under the same storage conditions.Our products have stable purity and low impurities; samples are available for testing.

The above is an overview from Yuze Magnesium Chloride Manufacturer on the differences between magnesium chloride hexahydrate and anhydrous magnesium chloride in terms of price, properties and classification.We will continue to update product introductions for magnesium chloride, calcium magnesium acetate and magnesium sulfate.