Which of the following is NOT among the three common EPA-registered disinfectant categories used in salons?

• A. Quaternary ammonium compounds
• B. Sodium hypochlorite
• C. Phenolic disinfectants
• D. Hydrogen peroxide-based disinfectants

Answer: (D)

In salon sanitation, the commonly used EPA-registered disinfectant categories for environmental surfaces are quaternary ammonium compounds (quats), sodium hypochlorite (bleach), and phenolics. These three cover a broad range of organisms and are widely recommended because they work well on typical salon surfaces and tools when used according to the label.

Hydrogen peroxide-based disinfectants exist and can be effective, but they are not counted as one of the three common categories in this setting. That’s why this option is the right choice for the question: it’s not part of the standard trio used in salons. Always follow the product label for proper dilution, contact time, and surface compatibility to ensure proper disinfection.