PSI Barbering Practice Exam 2026 – 400 Free Practice Questions to Pass the Exam

The answer focuses on the role of antiseptics, which are substances applied to living tissues to reduce the possibility of infection. Antiseptics are designed to destroy or inhibit the growth of pathogenic microorganisms. While hydrogen peroxide is indeed an antiseptic, it is important to clarify its role and concentration in antiseptic formulations.

Hydrogen peroxide is commonly used due to its strong oxidizing properties, making it effective against many types of bacteria, viruses, and fungi. It decomposes into water and oxygen upon contact, which aids in cleaning wounds and can create an unwelcoming environment for pathogens. Its application is favored in certain medical and personal care situations, especially in diluted forms, to ensure safety while remaining effective.

The other options, while they can also serve antiseptic purposes, do not encompass the characteristic high volume typically associated with antiseptics in comparison to hydrogen peroxide. Alcohol, for instance, is also a common antiseptic but is usually used in lower concentrations for effective antisepsis, often around 60-70%. Formaldehyde and phenols are more commonly recognized as disinfectants rather than antiseptics and are typically less suitable for application on living tissues due to their harshness and potential harmful effects. Thus, the predominant understanding aligns hydrogen peroxide