Calcium chloride is an inorganic salt, according to the form can be divided into solid and liquid two. Solid calcium chloride is a kind of white crystal, which can be divided into flake, granular and powder according to different shapes. Liquid calcium chloride is a colorless and transparent aqueous solution. Calcium chloride has the characteristics of high solubility, high heat of solution, strong hygroscopic property, and it is not easy to freeze when dissolved at low temperature.