R-134a:R-134a, also known as norflurane or Freon 134a, is a hydrofluorocarbon (HFC) refrigerant commonly used in automobiles, refrigerators, and other cooling applications.R-134a is a colorless, odorless gas that is non-flammable and has a low toxicity.It has high latent heat of vaporization, which means that it can absorb a lot of heat when it evaporates.It also has a low boiling point, which means that it can evaporate at a relatively low temperature