What is the required concentration of isopropyl alcohol for effective disinfection?

The required concentration of isopropyl alcohol for effective disinfection is 70%. This concentration is ideal because it contains enough water to slow down the evaporation rate of the alcohol, allowing it to remain in contact with the surface longer. This increased contact time enhances its ability to penetrate cell walls of bacteria and viruses, leading to more effective disinfection.

While higher concentrations, such as 90% or 100%, may seem more potent, they can evaporate too quickly and may not provide the necessary time for the alcohol to fully disinfect the surface. Lower concentrations, like 50%, may not be strong enough to effectively kill pathogens. Therefore, 70% isopropyl alcohol strikes the right balance between efficacy and evaporation rate, making it the preferred choice for disinfecting surfaces in a variety of settings, including those related to eyelash extension applications.