If you find only 91% isopropyl alcohol available buy it and dilute it to 70%, because the 30% water makes it more effective at killing virus. The simple way to do this is to add 0.3 part water (three tenths) to one part 91% alcohol.
How do you dilute 90% alcohol to 70?
So you should add 286 mL of water to your litre of 90% alcohol, to make 70% alcohol.
How much water do you mix with 91 alcohol?
Ingredients: 8 fl oz, of 91% Isopropyl Alcohol. 2 fl oz tap water.
How do you dilute 90 alcohol?
Therefore, you would have to add 7.5 L (2 US Gal) of water to the 6 L (1.6 US Gal) of 90% alcohol which would ultimately give 13.5 L (3.6 US Gal) of 40% ABV alcohol.
Can you water down rubbing alcohol?
Yes, you could use tap water that way. Why would you do that? Diluting the isopropyl alcohol would reduce its effectiveness for external use as an antiseptic or for cleaning. Diluting it wouldn’t make it safe for drinking.
How do you make 70% alcohol?
Add 350 mL of 100 percent isopropyl alcohol to a 500 mL graduated cylinder. Ensure that the measurement is read at eye level with the meniscus, the bottom of the curved liquid, at 350 mL. Add an additional 150 mL of water to the graduated cylinder for a total volume of 500 mL, again measured at eye level.
What is 91 percent isopropyl alcohol used for?
Many people use 91% isopropyl alcohol to clean cuts and burns on the skin, and to promote healing. Well used in medical scenarios, 91% isopropyl alcohol often features in first aid kits. It’s ideal for those cuts and scrapes that require a quick clean.
Can I use 91 isopropyl alcohol to clean my phone?
A mixture of distilled water and isopropyl alcohol is perfect for killing germs without hurting your phone. But aim for 70% isopropyl alcohol, not the stronger 91 or 99%. This will be kinder to your phone.
Is 70 or 91 isopropyl alcohol better?
Even though you may think the higher concentration is more effective, experts say 70% is actually better for disinfecting. It has more water, which helps it to dissolve more slowly, penetrate cells, and kill bacteria. The disinfecting power of rubbing alcohol drops at concentrations higher than 80%-85%.
Can you dilute 99 isopropyl alcohol with tap water?
Tap water will be fine. The alcohol you’re diluting will disinfect it. If you want to be ultra-sure, then use distilled. … “… we find that they would need to add 3.31 ounces of (distilled) water with 8 ounces of 99% IPA …”