Kansas Cosmetology Practice Exam 2025 - Free Cosmetology Practice Questions and Study Guide

Alcohol is a primary ingredient commonly found in most antibacterial sanitizers due to its effectiveness in killing a wide range of bacteria and viruses. It works by denaturing proteins and disrupting the cell membranes of pathogens, making it a powerful antiseptic. The concentration of alcohol, typically around 60-95%, is crucial for the sanitizer to effectively eliminate germs, as lower concentrations may not provide the same level of efficacy.

Although other substances mentioned can be used in different contexts or formulations, they do not serve the primary antiseptic function that alcohol does. For example, hydrogen peroxide can also have antibacterial properties, but it is less commonly used in hand sanitizers because it can be harsh on the skin and has a slower action compared to alcohol. Moisturizers and glycerin are often included in sanitizers to help prevent skin dryness from frequent use of alcohol, but they do not possess antibacterial properties themselves.