 then yes, it is an antiquated refrigerant, and it is changing now. I'm sure that continued exposure to it is not a good thing, although it's probably a fairly small amount. In most cases, this stuff will evaporate out very slowly over time, so I don't think it's a huge exposure, but certainly any exposure is not good. And I think if you can focus on identifying the source of the leak and not just keep putting more in,