Calcium Chloride Powder is the powder form of calcium chloride. It is prepared by spray drying. Its normal content is around 74%, 77%, 90%, 94%, 97%. 74% and 77% are known as Dihydrate Calcium Chloride. While 90%, 94%, and 97% are called Anhydrous Calcium Chloride.

Powdered calcium chloride is highly hygroscopic and can easily absorb moisture in the air during use and is corrosive. The powder form is typically used as an additive, including as an accelerator in concrete to decrease set times in cold weather, as refrigeration for skating rinks and cold storage facilities, and as a desiccant to remove moisture where it will absorb so much water that it will eventually dissolve into the water it attracts.  Also, it is commonly used in oil fields as a drilling chemical. 

Due to the hygroscopic nature of calcium chloride, the powder form will easily adhere to equipment, workshops and personnel after absorbing water, which will endanger the normal operation of equipment and the health of personnel. Please read MSDS for precautions before use.