RE. Hand sanitizer ....from a freeper...I was using 91% alcohol and they told me the following...told me I needed to dilute the 91% alcohol to make it work better....here’s the explanation...and a recipe...
91% straight is going to dry your skin out like a long day at the beach. Add a little bottled water to it to take the % down a tad and decrease flammability. (might add some aloe gel too, if you’re going to use it as a hand sanitizer)
The CDC website recommends 70-91%.
Why not use 95 or 99%?
When you sear a roast, you’re protecting the juices inside the meat. The higher percentage alcohol you use, the faster you’re going to sear or seal the outside of a cell and the alcohol isn’t going to get inside that cell. Water prevents searing and acts as a tool for the alcohol to enter the cell. The pressure difference between the water on the outside and pressure inside of the cell sucks that alcohol right in. Water also has a static charge that will help Velcro onto both the virus and the alcohol, reducing evaporation time and giving the alcohol more time to do its thing.
RECIPE - reducing 91% to 70%
In cups, from eHOW.co.uk
Measure out one cup of 91 per cent rubbing alcohol, and pour it into the plastic container.
Add one-third of a cup of water and stir to mix the solution. The solution is now 70 per cent rubbing alcohol.
In grams (from answers.com)
measure 77 g of 91% alcohol and add 23 g of water.
Thank you for the alcohol dilution recipe. One hint, though -— alcohol will degrade some plastics. Obviously, the plastic bottle it comes in, is not one of them. I ruined a watch face cover once, cleaning it with alcohol; it dissolved the plastic a bit and made it cloudy. ;)
Thanks everyone for the hand sanitizer info. Went shopping earlier this evening and there were signs on the now empty shelves that only 4 (name item) per person. Who knows how long before they are restocked.
(BTW, if the isopropyl alcohol is gone, clear vodka (ethyl alcohol) might work as a substitute!)
Thanks for the recipe.
I have some 50% (??) Isopropyl and some 91%....how much 91 should I add (to say a cup) to make the 50% into 70%?
1/3 C?
Math’s hard ... lol.