Which concentration of ethyl alcohol is the most effective bactericide?

Question

Quizplus · Accepted Answer

70% ethyl alcohol has been shown to be the most effective concentration for killing bacteria. This is because 70% concentration allows for a slower evaporation rate, which allows the alcohol to penetrate the cell walls of bacteria and denature the proteins and enzymes inside the cells, effectively killing them. Higher concentrations (such as 90% or 100%) can actually be less effective because the alcohol evaporates too quickly, limiting its ability to penetrate the cell walls. Lower concentrations (such as 50% or 20%) may not contain enough alcohol to effectively kill bacteria.

Which Concentration of Ethyl Alcohol Is the Most Effective Bactericide