Massachusetts State Board Esthetics Practice Exam

Which type of disinfectant can be harmful to skin and eyes due to its high pH?

1. Bleach

2. Phenolic disinfectants

3. Alcohol-based disinfectants

4. Quaternary ammonium compounds

The correct answer is: Phenolic disinfectants

Phenolic disinfectants are known for their strong antibacterial properties and effectiveness in various disinfection scenarios. However, they can pose risks to the skin and eyes primarily due to their high pH levels, which may lead to irritation or chemical burns upon contact. This high pH can disrupt the natural barrier of the skin, leading to potential adverse reactions. Many salons and esthetic practices utilize these disinfectants because of their potency, but it's crucial for professionals to handle them with care, using appropriate personal protective equipment such as gloves and goggles to mitigate risks. Proper training and knowledge of safety procedures when using phenolic disinfectants are essential to avoid harm to both clients and estheticians. While bleach, alcohol-based disinfectants, and quaternary ammonium compounds are also used in professional environments, they do not carry the same level of risk regarding high pH. Bleach can irritate skin and eyes, but its primary hazard is linked to its chlorine content. Alcohol-based disinfectants can be drying and irritating, but they are not typically associated with high pH issues. Quaternary ammonium compounds are generally safe for skin and eyes when used as directed. Hence, phenolic disinfectants stand out due to their high pH and the associated risks