[Nehmo]

This vid https://www.youtube.com/watch?v=xmQRB64CHKA advocates using Dust Off, which contains difluoroethane, rather than the usual and more expensive R134a in a vehicle air conditioning system. Nthefastlane, the vid uploader, claims it works just as well and is safe.
So, is difluoroethane a reasonable alternative to R134a? Would there be any reason to not use it? And if so, why is it not more popular?

[mjc123]

I don't know, but I see that "The Society of Automotive Engineers (SAE) has proposed 1,1,1,2-tetrafluoroethane (HFC-134a) to be best replaced by a new fluorochemical refrigerant HFO-1234yf (CF3CF=CH2) in automobile air-conditioning systems." http://en.wikipedia.org/wiki/1,1,1,2-Tetrafluoroethane