Calcium chloride (chemical formula: CaCl2) is a white or slightly yellow solid inorganic compound, classified as a salt and a typical ionic halide. Due to its high solubility, hygroscopicity, and dehydrating properties, it is widely used in various fields. Depending on its hydrated forms, it exists in different physical states, with the most common being the dihydrate (CaCl2·2H2O). Its high solubility allows it to dissolve rapidly in water, releasing a significant amount of heat, making it particularly useful in applications requiring rapid heating or drying. Additionally, calcium chloride is commonly used in brine for refrigeration equipment, road de-icing agents, and desiccants.