Here's a quote from a user on a different forum that applies to the research chemical you're enquiring about:
"I know its bringing up an oldish thread but I thought i'd chime in my experience - I had a bottle left in a cupboard for over a year from * which didnt seem to loose its potency/effects at all. Just shook the bottle, no heating involved"
*Source name edited out
Now, I seriously suggest you edit that first post.