02-18-2011, 03:41 PM
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Originally Posted by DKRST
Don't know about the others, but the sealed epsom salts should be good almost indefinitely. Most meds won't get toxic with age, but they usually become less effective past a certain point. The biological dyes (methylene blue and malachite green) would stay effective a long time, but anything with formalin would be suspect since components of formalin will evaporate over time. Copper sulfate, assuming the concentration had not changed due to liquid loss over time from evaporation, should be good a long time. Much depends on the quality of the container the meds are stored in, exposure to light and storage conditions.
The above is a long-winded version of "it depends", sorry!
Good info! I have Quick Cure, lots of bottles that, not opened...The containers are good and they have been in a dark cabinet and dry as well.