CH3CHF2

CH3CHF2, also known as 1,1-difluoroethane, is a hydrofluorocarbon with the chemical formula C2H4F2. It is a colorless gas at room temperature and pressure, and it is flammable. 1,1-difluoroethane is a halogenated alkane that contains two fluorine atoms bonded to one of the carbon atoms and three hydrogen atoms bonded to the other.

This compound has found various applications, primarily as a refrigerant and as an aerosol propellant. Its thermodynamic properties make it suitable for use in refrigeration cycles, often as a component in blends. As an aerosol propellant, it replaced chlorofluorocarbons (CFCs) due to its lower ozone depletion potential. However, like other hydrofluorocarbons, it is a greenhouse gas and contributes to global warming.

1,1-difluoroethane can be synthesized through several chemical routes. One common method involves the hydrofluorination of vinylidene chloride. Its production and use are subject to regulations aimed at controlling its environmental impact, particularly its contribution to climate change. While it is considered less harmful to the ozone layer than CFCs, its global warming potential remains a concern, leading to ongoing research into more environmentally friendly alternatives.