Flake Powder Granule 74 77 Chloride Calcium CaCl2 Industrial Inorganic Salt Calcium Chloride Calcium chloride, a chemical substance composed of chlorine and calcium, has the chemical formula CaCl2. Slightly bitter. It is a typical ionic halide, white, hard pieces or particles at room temperature. Its common applications include brine used in refrigeration equipment, road ice melting agents and desiccants.