Calcium Chloride Types: Anhydrous, Dihydrate & Flake Comparison

Calcium chloride is a high-efficiency inorganic salt with strong hygroscopicity, widely used in de-icing, dust control, drying, construction, and food industries. The three most common types are anhydrous calcium chloride, dihydrate calcium chloride, and flake calcium chloride. This article compares their differences to help buyers choose.

 

Anhydrous calcium chloride has a purity of 94%–99%, appearing as white or off-white granules or powder. It has extremely strong water absorption capacity, making it ideal for industrial drying, air dehydration, and desiccants. It is widely used in petroleum, chemical, and mechanical industries.

 

Dihydrate calcium chloride has a purity of 74%–77%, usually in the form of flakes or particles. It has good solubility and stable performance, suitable for de-icing agents, dust control, construction accelerators, and aquaculture. Its cost-effective performance makes it popular in global markets.

 

Flake calcium chloride is easy to dissolve and apply, commonly used in road snow removal, antifreeze, and dust suppression. Flake form reduces dust pollution and improves construction efficiency.

 

Key differences include purity, hygroscopicity, solubility, application scenarios, and price. Anhydrous has higher purity and cost, while dihydrate and flake types offer better economic benefits for general industrial use.

 

When purchasing, buyers should select based on specific usage. For high-demand drying applications, anhydrous calcium chloride is better. For de-icing and dust control, dihydrate or flake types are more suitable.

 

As a professional calcium chloride exporter, we provide all three types with customizable specifications and packaging. Our products meet international standards for global customers.