R123 Refrigerant Heavier Than Air The R123 refrigerant is a type of refrigerant that is heavier than air. It is commonly used in air conditioning systems and other refrigeration applications. The R123 refrigerant is also known as trichloroethylene, which is a chemical compound made up of three chlorine atoms bonded together with an ethylene group. The R123 refrigerant has a boiling point of around -40°C, which means that it can be used to cool down objects at temperatures below this temperature. However, the R123 refrigerant is not suitable for use in high-temperature environments, such as those found in hot summer days or in outdoor air conditioning units. In addition to its cooling properties, the R123 refrigerant is also used in industrial processes, such as in the production of plastics and chemicals. It is also used in medical applications, such as in the treatment of certain types of cancer. Overall, the R123 refrigerant is a versatile substance that has many uses in various industries. Its ability to cool down objects at low temperatures makes it a popular choice for air conditioning systems and other refrigeration applications.