Fight COVID-19 on the go with homemade hand sanitizer (Popular Science)

[eppur_se_muova]

By Sandra Gutierrez G.
Updated: March 5, 2020
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There are two main formulas out there: one, recommended by the World Health Organization, is closer to liquid than gel and is harder on your hands, while the other will be gentler on your skin and closely resembles the feel of store-bought hand sanitizer. Which one you make depends on your personal preference.

But before you start, it’s crucial that you understand simply rubbing your paws with hand sanitizer is not a substitute for good ol’ hand washing. Alcohol-based disinfectants used in the right amount (3 milliliters) and rubbed long enough (25 to 30 seconds) are fine in a pinch, because you’re not always near a sink. But soap, water, and a good scrub is the absolute best way to protect yourself against contagious diseases. Got it? Good. Let’s do this.

Stats

Time: literally 2 minutes

Estimated ingredient cost: $15 (makes 3.5 cups, or 15 of those little two-ounce bottles)

Difficulty: easy
Tools

Measuring cup
Measuring spoons
Whisk
Empty spray bottles (for WHO formulation)
Empty lotion or sanitizer containers (for gel formulation)
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more: https://www.popsci.com/story/diy/diy-hand-sanitizer/

[we can do it]

1. S T O P

[intrepidity]

2. You left out the most important part!

Ingredients
1 cup of 99% isopropyl alcohol
1 tablespoon of 3% hydrogen peroxide
1 teaspoon of 98% glycerin
¼ cup, 1 tablespoon, and 1 teaspoon (or 85 milliliters) of sterile distilled or boiled cold water

But, good luck finding 99% IPA!

[eppur_se_muova]

3. There's two formulas, full instructions don't fit in the 5-para limit, so click the link. nt

You can use 90% IPA, which is available in pharmacies, and less water. The instructions will give about 80% after mixing.

Weird way to measure out 85ml; I'm sure it doesn't need to be that precise.