Which statement about disinfectants used in salons is true?

• A. They can be used on skin
• B. They are never used
• C. Formalin cannot be used in the salon
• D. They do not require ventilation

Answer: (C)

Disinfectants in salons are used to sanitize tools and nonporous surfaces, not skin. They must be used according to label directions and safety regulations, with appropriate ventilation to avoid inhaling fumes.

Formalín (formaldehyde solution) cannot be used in the salon because formaldehyde is a toxic, irritating, and carcinogenic chemical. Its fumes pose health risks to workers and clients, and regulations restrict or prohibit its use in cosmetic settings, making that statement true.

The other options don’t fit: disinfectants are not intended for skin contact, so they shouldn’t be used on skin; they are indeed used in salons, so saying they are never used is false; and many disinfectants release fumes or vapors that require good ventilation, so the idea that they do not require ventilation is incorrect.