Refrigerant 410A (R-410a) is a non-flammable hydrofluorocarbon (HFC) blend of R-32 (50%) and R-125 (50%), widely used in residential and commercial air conditioning systems as a high-efficiency replacement for R-22. It offers superior cooling performance but has a high global warming potential, leading to regulatory restrictions in some regions. Stored as a compressed gas or liquid, R-410a is colorless and nearly odorless, posing minimal health risks except as an asphyxiant in confined spaces. Proper system maintenance and leak prevention are critical to minimize environmental impact and ensure safe operation.