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Old 05-15-2020, 11:16 AM
Jackknifed Juggernaut is offline
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Hand Sanitizer in Hot Car


Will it maintain its effectiveness? Google shows a variety of answers.
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Old 05-15-2020, 11:32 AM
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Its going to depend on the type of sanitizer and its container. For the WHO recipe it's effectiveness if driven by its alcohol content once it drops below 60% it is not doing its job. Ethanol can volitize at fairly low temperatures so it wouldn't surprise me if the first time you opened it hot you would lose a blast of ethanol. If the container wasn't vapor tight to begin with it, I would expect it to constantly lose ethanol when hot.

Its going to depend on temperature and relative humidity too much to give specifics.
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Old 05-15-2020, 05:36 PM
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It will vary by product, of course. The hand sanitizer that I just got in a big supply of is a thick gel with 62% alcohol and a long list of other ingredients (primarily moisturizers, I think) and contains a lot of information on the label, including recommended storage between 15 and 30C (60F to 86F) -- so IOW, more or less room temperature. I also have some thin distillery-made hand sanitizer with 70% alcohol that has no storage instructions, but both types state the obvious "keep away from sources of heat" due to the alcohol content.

Leaving it in a hot car is a bad idea, IMO. It's unlikely to catch fire, but it may pressurize a closed bottle and/or cause it to lose alcohol on opening. We aren't quite into the really hot season here yet, but the car can get pretty warm sitting in direct sunlight and it can still can cold at night, so I always bring the bottle of hand sanitizer into the house with me. I would follow the general rule to try to keep it at around room temperature if at all possible.
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Old 05-15-2020, 06:40 PM
Jackknifed Juggernaut is offline
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Yeah, that’s what I figured. It’s kind of a pain, but will have to bring the bottle in.
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Old 05-16-2020, 03:17 PM
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I'm a photographer, and years ago I started to carry a Styrofoam six-pack cooler in the van for the camera's protection. Even several hours in the sun with interior temps climbing way over a hundred left the Canon cool to the touch, as well as out of sight and cushioned against sharp turns and panic stops.

Not a bad place to store your mask, either.

Dan

Oh, yeah - my sanitizer is in a pump spray bottle, so absent a loose pump-cap, I don't see vapor escaping.
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Old 05-17-2020, 06:25 AM
Jackknifed Juggernaut is offline
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....Styrofoam six-pack cooler in the van.....
Thats interesting. This is without an ice pack inside?
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Old 05-19-2020, 03:52 PM
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I keep one of those little flip top squeeze bottles, maybe a few ounces, in the car.
Last week, we had a very warm day and the little bottle was clearly bulging from the pressure.
I burped it and made a point to make sure it stays right side up when not in use in case it blows.
It would probably be better to keep it closer to full, too.
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Old 05-19-2020, 04:06 PM
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but it may pressurize a closed bottle and/or cause it to lose alcohol on opening.
Can confirm, does happen.

To make it worse, when all this started I grabbed some hand sanitizer out of my daughters room. She had tons of those little tiny bottles, the kind you see on keychains. The one I grabbed, on top of being pumpkins spice has little microbeads in it. They're getting all over the place. I'm not concerned with it transferring from my hands to the steerwheel/stick/seatbelt, but those beads get dried onto everything too.
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Old 05-20-2020, 09:18 AM
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J.J., yes, no ice pack.

Dan
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Old 05-20-2020, 04:35 PM
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I realize that it probably won't happen, but I will not be that surprised if some car in Texas catches fire this summer from hand sanitizer
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Old 05-22-2020, 08:25 PM
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J.J., yes, no ice pack.

Dan
Thanks. Will try it out!
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Old 05-23-2020, 03:05 PM
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the small cooler is a great idea.

I had a cigarette lighter explode in a car (but not ignite) from direct exposure to the sun. It was one of those hard plastic kind you can easily see the fluid in. I couldn't figure out why there were all these tiny pieces of plastic in the car until I found the flint wheel.

I also had a quart of isopropyl alcohol in the car away from direct sunlight and the heat of the car caused it to expand and leak to the point I could smell it.
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