Calcium chloride is a salt compound that is made up of calcium and chlorine. It is a white, odorless solid that is highly soluble in water, making it a common choice for various industrial, commercial, and domestic applications. Calcium chloride is often used as a desiccant, a de-icing agent, and a coagulant in various industrial processes. It is also used in food production as a firming agent, and in medicine as a source of calcium supplement for individuals with calcium deficiency. Additionally, calcium chloride is commonly used in aquariums to provide necessary calcium ions for aquatic plants and animals. Overall, calcium chloride is a versatile and important substance with a wide range of practical applications.