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Anhydrous calcium chloride and calcium chloride dihydrate are the same chemical substance, but they contain different Water of crystallization. Anhydrous calcium chloride is basically free of water molecules, with a content higher than 94, and the general product shape is spherical;

Calcium chloride dihydrate means that each molecule of calcium chloride exists in the form of two Water of crystallization, with the content of more than 74, generally in the form of flakes.

Due to the higher content of anhydrous calcium compared to calcium dihydrate, the price is correspondingly higher, but it does not mean that the quality of calcium chloride dihydrate products is inferior to anhydrous calcium. Anhydrous calcium is concentrated on the basis of dihydrate, with a small amount used, but a larger amount of dihydrate used.