Nutrients shelf life

I've got a got amount of Nutrients that I never got a chance to use that are about a year or two old. I was wondering if anybody has used old nutrients and if they were still effective or if I'm best off tossing them out.

If they are a synthetic base, then they don't go bad. If they are organic base, they might, but it depends on the method of manufacture and whether or not a brewing process occurred.

If they been subject to weather change cold and hot the salts in them will solidify that's the only issue I found