Gas/Vapor Respirators
Two organic vapor respirator cartridges with particulate filtration.
Gas/vapor air-purifying respirators generally come in the form of cartridges that attach to a reusable partial- or full-face mask. Each cartridge is designed to be effective for specific gases or vapors. As with particulate respirators, you must match the cartridge to the hazard for the respirator to work properly. A gas/vapor cartridge alone won’t protect you from particles, unless it’s specifically designed to include particle filtration. Cartridges are color-coded to indicate the type of hazards they filter. Common color codes include:
Black: Organic vapors
White: Acid gases
Yellow: Organic vapor and acid gases
Green: Ammonia gas
There are additional color codes for other hazards, including colors for particulate filters designed for use with gas/vapor respirators.
While you can usually clean and reuse the mask portion of a gas/vapor respirator, it won’t last forever. Check it for wear or damage before and after using it and according to the manufacturer’s instructions. Store the cartridges properly and don’t use them after their expiration dates. When using the cartridges, you must replace them periodically to maintain protection. The cartridges don’t offer protection once their capacity to absorb is exhausted, so follow the manufacturer’s recommendations.
https://www.lowes.com/n/buying-guide/respirator-safety-mask-guide
Respirators should be professionally fitted