Which characteristic is true of chlorine-containing disinfectants?

Chlorine-containing disinfectants are known for their effectiveness in killing a broad spectrum of pathogens, which makes them a popular choice in veterinary settings. However, one of the notable characteristics of these disinfectants is that they may irritate the skin and respiratory tract. This is due to the strong chemical nature of chlorine and its ability to release gaseous compounds that can cause irritation upon contact or inhalation.

In veterinary practices, it is critical to use these disinfectants in well-ventilated areas to minimize exposure to fumes and to ensure that proper personal protective equipment (PPE) is worn by personnel. This awareness is essential for safety during cleaning procedures, as animals and humans may both be adversely affected if safety measures are not strictly observed.

The other options concerning residual activity, skin irritation, and safety around animals do not accurately represent the hazards associated with chlorine-containing disinfectants, which is why they would not be the correct choice. Understanding the potential risks helps veterinary assistants employ these necessary tools safely and effectively.