Phenolic disinfectants are best described as?

• A. They are non-toxic and safe for all surfaces
• B. They are powerful tuberculocidal disinfectants
• C. They are the same as bleach
• D. They evaporate quickly

Answer: (B)

Phenolic disinfectants are valued for their strong antimicrobial action, including the ability to kill Mycobacterium tuberculosis. That tuberculocidal capability is the hallmark that makes them stand out, so describing them as powerful tuberculocidal disinfectants is the most accurate. They aren’t non-toxic or safe for every surface—phenolics can be harsh on skin and finishes and may require careful surface compatibility checks. They’re also not the same as bleach, as they’re a different chemical family with distinct properties, and they don’t evaporate quickly, often leaving a residue that contributes to persistent disinfection.