How long does 70% alcohol take to kill COVID-19 on surfaces?
You can dilute alcohol with water (or aloe vera to make hand sanitizer) but be sure to keep an alcohol concentration of around 70% to kill coronaviruses. Solutions of 70% alcohol should be left on surfaces for 30 seconds (including cellphones) to ensure they will kill viruses.
How does cleaning surfaces with alcohol kill the coronavirus?
When you soak a virus in alcohol – in this case ethanol or isopropanol – and let it air dry, the alcohol breaks down the fatty bilayer that holds the virus together.
Specifically, you’ll find 70% alcohol easily available. Anything between 60-80% alcohol will work just fine.
How to properly sanitize something to prevent the coronavirus disease?
Hand sanitizers are not intended to replace handwashing in food production and retail settings. Instead, hand sanitizers may be used in addition to or in combination with proper handwashing.
CDC recommends that everyone wash their hands with plain soap and water. Alcohol-based hand sanitizers may be used if plain soap and water are not available. As an interim measure, we understand some food establishments have set up quaternary ammonium hand-dip stations and sprays at 200 ppm concentration.
These products are intended for use on surfaces, and as such, may not be formulated for use on skin. FDA is aware of adverse event reports from consumers using such products as a replacement for hand sanitizers and advises against using these products as replacements for hand sanitizers.
What does it mean when the label of my hand sanitizer says ‘alcohol’?
Hand sanitizers labeled as containing the term “alcohol,” used by itself, are expected to contain ethanol (also known as ethyl alcohol). Only two alcohols are permitted as active ingredients in alcohol-based hand sanitizers – ethanol (ethyl alcohol) or isopropyl alcohol (isopropanol or 2-propanol). However, the term “alcohol,” used by itself, on hand sanitizer labels specifically refers to ethanol only.
Methanol and 1-propanol are not acceptable ingredients in hand sanitizer and can be toxic to humans.