Honestly, we haven't found an expert about hCG. For example, there is a suggestion that perhaps mixed hCG can be frozen, but we haven't been able to confirm that. Why does mixed hCG need to be refrigerated and why is it only good for 60 days? Probably because of bacteria growth, but I'm not 100% sure. hCG is supposedly very fragile...not sure if that has anything to do with it.
I've never heard of bacteriostatic water itself going bad after 60 days in (or out) of the fridge, which makes this all the more questionable.
If you do decide to give this a try (and I think you are crazy if you do), do let us know what happens..