How should CO₂ extinguishers be handled to avoid injury?

CO₂ extinguishers contain carbon dioxide under high pressure, which, when released, can cause the nozzle and parts of the extinguisher to become extremely cold. Therefore, it's crucial to wear gloves to protect your skin from frostbite caused by direct contact with the discharge. Holding the extinguisher upright ensures that the CO₂ is dispensed properly, providing maximum effectiveness and minimizing the chance of injury from improper handling. This approach prevents burns or frostbite that can happen if the user is not adequately protected.

Other options do not effectively address the risk of injury associated with CO₂ extinguishers. Shaking the extinguisher could destabilize its contents and is not necessary for its operation. Applying from a distance is generally unnecessary when using these extinguishers effectively, and while goggles can be beneficial in many situations, they are not specifically required for operating a CO₂ extinguisher under normal conditions. Using the extinguisher in well-ventilated areas is also important for safety in general but does not directly relate to injury prevention during its operation.