In medical settings, 75% alcohol (specifically ethanol) is commonly used as a disinfectant. This concentration is optimal for killing bacteria and viruses because it effectively penetrates microbial cell walls without evaporating too quickly.
95% alcohol, on the other hand, is less effective for disinfection. High concentrations cause proteins in pathogens to coagulate too rapidly, forming a protective layer that prevents the alcohol from fully penetrating and killing the microbes. It is typically used for industrial or laboratory purposes, such as cleaning equipment or as a solvent.
In summary:
Note: In some countries, "rubbing alcohol" may refer to isopropyl alcohol (IPA), which is also used for disinfection at 70-75% concentration. Always check the label for specifics.
