During liquid chemical sterilization, what is the primary compound used for sterilizing endoscopic instruments?

The primary compound used for sterilizing endoscopic instruments during liquid chemical sterilization is peracetic acid. This choice is favored because peracetic acid is a highly effective antimicrobial agent that can kill a broad spectrum of microorganisms, including bacteria, viruses, and spores. Its efficacy as a sterilant is particularly important in endoscopic procedures, where instruments must be thoroughly sterilized to prevent any risk of infection to patients.

Peracetic acid operates effectively even at low temperatures and does not leave toxic residues, making it well-suited for the delicate equipment used in endoscopy. This makes it a preferred choice among disinfection and sterilization agents in healthcare settings.

Other options mentioned, such as phenolic compounds and quaternary ammonium compounds, are typically used for disinfection rather than sterilization, meaning they may not be effective against spores and other resistant forms of microorganisms. Sodium hypochlorite is also primarily a disinfectant with limited effectiveness as a true sterilant, especially for intricate devices like endoscopic tools. Thus, peracetic acid stands out as the best choice for achieving the stringent requirements of sterilization in endoscopic instrument processes.