What should be worn before entering an area with harmful concentrations of chlorine gas?

When entering an area with harmful concentrations of chlorine gas, a self-contained breathing apparatus (SCBA) is essential for ensuring safety. Chlorine gas is a highly toxic substance that can cause severe respiratory issues and other health problems upon inhalation. An SCBA provides a supply of clean, breathable air directly to the wearer, which is critical in environments where breathable air may be compromised due to high levels of toxic gases.

While standard safety goggles, chemical-resistant gloves, and protective coveralls are important personal protective equipment (PPE) items in various scenarios, they do not protect against the inhalation of harmful substances. Goggles protect the eyes from exposure, gloves protect the hands from direct contact with chemical substances, and coveralls shield the skin and clothing from spills and splashes. However, none of these items can prevent inhalation of chlorine gas. Therefore, using an SCBA is the only option that effectively protects the respiratory system in areas where chlorine concentration is dangerously high.