Calcium chloride, composed of chlorine and calcium, has the chemical formula CaCl2. It is a typical ionic halide, a white solid at room temperature, and its aqueous solution is neutral.
Used in salt water, road ice melting agent and desiccant used in refrigeration equipment. Because it is easy to absorb water and deliquesce in the air , anhydrous calcium chloride should be stored in a sealed container. Calcium chloride and its hydrates and solutions have important application values in food manufacturing, building materials, medicine and biology.
Granular anhydrous calcium chloride is often used as a desiccant to fill the drying tube , and macroalgae dried with calcium chloride can be used for the production of soda ash. Some household dehumidifiers such as DampRid use calcium chloride to absorb moisture in the air.
Calcium chloride can also be used as a desiccant or dehydrating agent for gases and organic liquids. Because calcium chloride is neutral, it can dry acidic or alkaline gases and organic liquids.
It can also be used in the laboratory to produce small amounts of gases such as nitrogen, oxygen, hydrogen, hydrogen chloride, sulfur dioxide, carbon dioxide, nitrogen dioxide, etc. Dry these produced gases.
But it cannot be used to dry ethanol and ammonia, because ethanol and ammonia react with calcium chloride respectively.