Soundness of mind

Why is 70 alcohol better than 90?

70% alcohol is better than 90% alcohol for disinfecting surfaces and skin because it is less harsh. 70% alcohol is also better for cleaning because it is less likely to damage surfaces. 90% alcohol can be used for sterilizing medical equipment and other surfaces, but it is not recommended for everyday use.

Which alcohol is better 70 or 90?

The answer to this question depends on the type of alcohol you are referring to. Generally speaking, higher proof alcohols are more concentrated and contain more alcohol by volume (ABV) than lower proof alcohols. For example, 70 proof vodka contains 35% ABV, while 90 proof vodka contains 45% ABV. The higher proof alcohol will be stronger and have a higher alcohol content. However, it is important to keep in mind that higher proof alcohols can also be more expensive, so it is important to consider the cost when making your decision.

Why is 70 alcohol used for sterilization not 90?

70% alcohol is used for sterilization because it is a more effective concentration than 90% alcohol. 70% alcohol is more effective at killing bacteria and other organisms than 90% alcohol because it is able to penetrate the cell walls of the organisms more effectively. This is because the water content in 70% alcohol helps to break down the cell walls of the organisms and makes it easier for the alcohol to enter the cells and kill them. Additionally, the lower concentration of alcohol ensures that the alcohol does not evaporate too quickly, allowing it to remain on the surface of the object being sterilized for a longer period of time.