Refrigerant 134a (R-134a), or 1,1,1,2-tetrafluoroethane, is a colorless, odorless, and non-flammable hydrofluorocarbon (HFC) widely used as a refrigerant in automotive air conditioning, commercial refrigeration, and domestic appliances. Developed as an environmentally safer alternative to chlorofluorocarbons (CFCs), R-134a has no ozone depletion potential but a high global warming potential, prompting phase-down efforts under international regulations. It is stored as a compressed gas or liquid under pressure and poses minimal health risks, though it can act as an asphyxiant in high concentrations. Proper handling and recycling are essential to minimize environmental impact.
