I’m considering the switch to benzalkonium-chloride-based (BAC) hand sanitizers for backcountry use mainly because I wear contact lenses, and residue from alcohol hand sanitizers a) takes a really good rinse of water to remove (imagine where water is scarce overnight after cooking and hydrating), and b) it’s often hard to rinse ALL the alcohol residue from my hands. True, in the worst-case I’ve had, I’ve only felt the slight sting from the alcohol in my eyes, but someday this is going to be worse. My main interest in these alcohol-free hand sanitizers is reducing eye-sting, but I would also like my hand sanitizer to be just as effective as alcohol.
Here’s what I’ve discovered when comparing alcohol to BAC sanitizers…
Pros:
-More effective. See this article.
-No eye-sting (applies to contact lens wearers).
-No skin irritation (this doesn’t really apply to me).
-Can be used as a wound antiseptic. (My son’s “Boo-Boo Juice” is labeled as such, and contains 13% BAC–the same as the hand sanitizers.)
-Preserves the skin’s natural boundary film (alcohol strips this away).
-Can be dispensed from a variety of recycled containers. I prefer to repackage in a 0.66 oz./20 mL contact lens daily cleaner bottle since it has a cap-keeper (can use one-handed).
-The brand I use, Soapopular (amazon.com), is odor-free–great for backpacking use (assuming some animal somewhere has been attracted to the smell of someone’s alcohol gel sometime in the past).
Cons:
-More expensive: about twice as much ($0.98 an ounce vs. $0.47 an ounce, when purchased in bulk). In reality, BAC only costs about 50% more since you typically use about 50% less of the product compared to alcohol. (I calculated this by using alcohol for one week, then BAC for another, and comparing the amounts used. If anything, “50% less” is an understatement.)
-Can’t start a fire with it.
-Once it starts to leak from the container, all of it could leak out (it’s a liquid, not a gel).
-As a liquid, it “feels” less effective on the hands (i.e., there’s very little residue from BAC products vs. gel products to support that warm-n-fuzzy “my hands are clean!” feeling). In addition, the brand I use, Soapopular, is odor-free (see Pros) which also contributes to the perception that it’s not as effective as alcohol gel.
Neither Here nor There:
-May require a “foaming” dispenser, which is not ultralight. (To be fair, I can’t find a good explanation for this type of dispenser, but I can only guess that it increases the surface area of the liquid, allowing it to disperse more quickly as a very thin layer.)
-I haven’t found the perfect dispenser yet. Purell alcohol comes in a tiny 0.5 oz. size which is perfect for short trips, but this container is not completely water-tight when closed (which works fine for the more viscous gel, not so good for BAC). I thought a spray dispenser would be best, but I noticed that a) a fair amount of the product wound up missing my hands, especially when it was windy, b) the spray dispensers are fairly large for their volume, and c) all compact spray dispensers required an unattached cap that would inevitably become lost. To judge the amount to use from my my contact lens daily cleaner bottle, I placed three good sprays from the supplied foaming dispenser into a container (the manufacturer recommends two sprays), then poured that into my palm once the foam had reverted to a liquid. This works out a puddle the size of a nickel–easy to judge from use-to-use.
I haven’t tried out BAC in the backcountry yet, but I think I’ll give it a go. Has anyone tried alcohol-free hand sanitizers? Is there something I’m missing?

