Final answer:
The correct answer is that an unlabeled bottle or container should never be used, even if you recognize the fluid. Always label containers, never mix disinfectants, wear PPE, and store chemicals in well-ventilated areas.
Step-by-step explanation:
All but one of the following precautions should be followed when working with disinfectants except: An unlabeled bottle or container may be used if you recognize the fluid. It is important to always use properly labeled containers for chemicals to avoid any potential mix-ups or accidents. When working with disinfectants, never mix two disinfectants together as it may cause a dangerous reaction. Additionally, it is crucial to wear personal protective equipment (PPE) such as gloves and goggles to protect against chemical exposure. Lastly, disinfectants should be stored in well-ventilated rooms to prevent inhaling fumes which can be harmful.