Which substance should NOT be used for disinfecting?

In the context of disinfecting, formaldehyde is not recommended due to its toxicity and potential health hazards. While it is effective at killing bacteria and viruses, formaldehyde can emit harmful fumes that pose risks such as respiratory irritation, allergic reactions, and potential long-term health effects. This makes it unsuitable for use in environments where skin and respiratory exposure could occur, such as salons or spa settings.

In contrast, isopropyl alcohol, hydrogen peroxide, and bleach are more commonly accepted disinfectants. They are widely used in various settings due to their efficacy against a broad spectrum of pathogens. Isopropyl alcohol is effective at sanitizing surfaces and skin, hydrogen peroxide serves as a potent disinfectant as well, and bleach is a strong disinfectant that is often used for various surfaces due to its ability to eliminate bacteria and viruses quickly. The safety profiles of these substances are more favorable when used according to guidelines, particularly when adequate ventilation and personal protective equipment are utilized.