- R-1234yf (C₃H₂F₄) → Used in new car ACs as an alternative to R-134a.
- R-1234ze (C₃H₂F₄) → Used in chillers and industrial cooling.
- R-717 (Ammonia, NH₃) → Used in industrial refrigeration; high efficiency but toxic.
- R-744 (Carbon Dioxide, CO₂) → Used in supermarkets and heat pumps; high pressure.
- R-290 (Propane, C₃H₈) → Used in household refrigeration; flammable but eco-friendly.
- R-508B (Blend of R-23 & R-116) → Used in ultra-low temperature refrigeration.
