There is an incredible number of threads on storage. They hardly differ at all in terms of techniques except for emphasis on particular sensitivities. Like: some compounds react to light, others hardly at all.
But the factors to take into account are:
- temperature
- oxygen (depending on the way the compound can degrade, a lot do so by oxidation - reacting with oxygen).
- water / moisture (often chemicals are not that instable themselves but if there is water present the chemicals can dissolve in that water creating ions: positively and negatively charged molecules. These can be more instable because they can more easily form intermediates which lead the way to degradation reaction).
- light, usually most importantly UV-light (which is a part of most of normal light but especially sunlight).
So you see, to store a drug properly for long-term you have to protect it from all of these four.
Exactly why the advice is: to put in an airtight baggy, put that next to a dessicant in a larger airtight container like a mini mason jar, double secure that container to prevent it accidentally opening and sticking it in fridge or freezer. Somewhere during the process you could apply aluminum foil against light, but I often don't do that unless I have a good reason to with a compound (i.e. acid). It's dark enough in the freezer I use anyway. Never direct sunlight or something like that. A little light in the appliance itself maybe, whatever.
Can I assume this answers the question that is the point of this thread?
