I am not familiar with the name Puron, is that a brand name for R-134a? R-134a was mandated to replace Freon and the general consensus at the time was that it had far more to do with the expiration of a patent than with any real environmental danger. It seems very strange that now they want to outlaw R-134a just about the time the patent should be running out on it. I am not a scientist either but I am 70 years old and have seen this movie before.
No! Puron (R-410) is not the same as R-134a.
Puron may be a brand name, I’m not sure. But when I googled it it has a number of R-0420 something. Not the numbers you folks are talking about. My technician told me this summer that it now sells for $275/lb for replacement. Glad I didn’t need any.