Calcium chloride, a chemical substance composed of chlorine and calcium, with the chemical formula of CaCl2. Slightly bitter. It is a typical ionic halide, white, hard fragments or particles at room temperature. Its common applications include salt water used in refrigeration equipment, road ice melting agent and desiccant. Because it is easy to absorb moisture in the air and deliquesce [5], anhydrous calcium chloride must be stored in a sealed container.