Which cartridge is appropriate for use against ammonia gas?

The magenta (purple) cartridge is appropriate for use against ammonia gas because it is specifically designed to filter out acidic gases and vapors, which includes ammonia. The color coding system for respiratory protection equipment helps users identify the appropriate cartridges for different types of contaminants. Understanding these color codes is crucial for ensuring safety in environments where hazardous gases are present.

In contrast, other cartridges are meant for different substances—for example, black cartridges are typically used for organic vapors, white cartridges for certain particulates, and yellow cartridges are commonly used for specific inorganic gases. Using the correct cartridge is essential for effective protection and to maintain safety standards in work environments that may contain harmful substances.