Chemical cartridges and canisters (gas masks) for air purifying respirators use sorbents to remove contaminant-specific gases and vapors. Used by themselves, they provide no protection from pesticide particulates; including liquid droplets from sprays, smoke, fogs, or dusts. The type of chemical cartridge or canister that must be used is specified on the pesticide label.
The most typical chemical cartridge or canister specified by the label for pesticide use is an OV (organic vapor-removing) cartridge or canister. They contain activated carbon that adsorbs organic vapor gas or vapor molecules from the air being drawn in through the container. Always use the type of purifying element required by the pesticide label.
Types of commercially-available chemical cartridges
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Chemical purifying elements are also available for “multi-gas/vapor” removal. If a pesticide label specifies OV cartridges, a multi-gas/vapor element that also includes OV may also be used.