What is a key requirement when handling materials requiring breathing apparatus?

Wearing specialized masks is crucial when handling materials that require a breathing apparatus because it serves to protect the respiratory system from harmful airborne contaminants. Specialized masks, such as respirators, are designed to filter out hazardous substances, including particulates, vapors, and gases, that could pose health risks to the individual. This protection is vital in environments where toxic substances are present, ensuring that the user can breathe safely without exposure to potentially dangerous materials.

In contrast, while ventilation systems can improve air quality, they are not always sufficient as a standalone solution in situations where the concentration of harmful materials is high and could overwhelm the effectiveness of mechanical ventilation. Chemical suits provide protection for the body against hazardous materials but do not address the need for respiratory protection specifically. Protective gloves, while essential for hand protection, do not provide any respiratory safety. Therefore, the use of specialized masks is the appropriate requirement in situations where breathing apparatus is needed.