An employee without a breathing apparatus is in a room where chlorine gas suddenly begins leaking. What should the employee do first?

In the scenario of a chlorine gas leak, the priority is to exit the contaminated area as quickly and safely as possible. The correct action involves keeping the mouth closed and keeping the head as high as possible, which is important because chlorine gas is denser than air and tends to settle near the floor. By maintaining a higher position, the employee can avoid inhaling the gas as they make their way out.

Walking quickly but not running is encouraged to ensure stability and avoid panic that could lead to accidents. This approach allows for a more controlled exit while minimizing exposure to the hazardous substance.

Calling for help is important but should ideally happen after the individual has reached a safe location. Sealing the room and waiting for rescue, or trying to neutralize the gas, can be extremely dangerous. These options would put the employee at further risk, as exposure to chlorine can lead to severe health consequences. Thus, immediate evacuation is the best first step in this emergency situation.