These products are categorised to have high ODP (Ozone Depletion Potential) and high GWP (Global Warming Potential). These products are subject to much usage legislation. According to the Montreal Protocol, this includes the sales ban in Article 2 (developed) countries from 1996, and Article 5 (developing) countries from 2010.
The Linde Group is able to help you choose suitable replacement products that offer less environmental impact whilst still providing effective chilling and cooling capacity.
For more information see the section on legislation.