This maybe a stupid question but I'm going to ask anyways.
I've gotten into the habit of making small aliquots of chemicals if they need to be at -20 just because it takes less time to thaw and I have this nagging voice in the back of my head that freeze thawing anything more than a couple times is not a good idea for any chemical.
I guess my question is: What types of chemicals should one be cautious about freeze thawing? If the insert says nothing about freeze thawing issues should I not worry about it?