Storing - Storing CP 55,940

[Waste]

SWIM is very interested in this chem, but has heard that it degrades very quickly.

Ultimately he plans to infuse a selection of herbs (he knows that he will need to up the dose because of his, he's been doing a lot of homework ) to make his own sort of smoking blend.

His trouble is that the stuff is quite pricey if not obtained in semibulk - bulk quantities.
He has heard that it stores quite well if the powder is kept at a chilled temperature (below 0*c?), can anyone confirm this, or give any info on just how well it stores?

Also, if he was to infuse herbs with it, how would he go about storing these, just keep them at a low temp too?

Finally, just how quickly does it degrade, days, weeks?

*edit*

And while SWIM's making a topic, is this chem legal to distribute for consumption in the UK?