Just found a stash of several bottles of old (exp: 2017) 91% isopropyl alcohol.
Should I toss them?
Now that I don’t know.
Not a clue.
I’d wager it’s not 91% anymore?
Maybe something online about that.
I know peroxide is dodgy after a while.
“Just found a stash of several bottles of old (exp: 2017) 91% isopropyl alcohol.
Should I toss them?”
NOOOOO!!!
The only thing that happens is that some of the alcohol evaporates. At only 3 years past the date, it is still probably 89%! I did have some old hand sanitizer from 2011. I added some 99% alcohol to bring the strength up in case the alcohol had evaporated. I would research more on the net about it.
Same goes for canned food too. It may not look or taste the best, but most stuff is still good to eat and have the nutrients.
I wouldn’t.
If they dry quickly, like fresh stuff, there’s still likely to be a fair amount of alcohol left.
Put some on an open cut and see what happens.
That should tell you quick enough.
No. Are they sealed?
No. Alcohol doesn’t expire. They will be perfectly usable. If the seals degraded or something similar, some of the alcohol might have gassed out. But if not opened, you should be good.