According to EPA criteria, what type of respirator must you wear when applying liquid pesticide products from Toxicity Class 1?

• A. A basic disposable dust mask
• B. A NIOSH-approved respirator with an organic vapor cartridge or canister plus N, R, P, or 100-series prefilters
• C. No respirator is required
• D. A full-face respirator with P100 filters only

Answer: (B)

When applying liquid pesticide products that are Toxicity Class 1, vapors present in the product pose an inhalation risk, so respiratory protection must guard against organic vapors. The EPA requires a NIOSH-approved respirator with an organic vapor cartridge or canister, and it should be used with appropriate prefilters (N, R, P, or 100-series) to protect the cartridge from particulates and to extend its life. A basic disposable dust mask does not protect against organic vapors, so it isn’t sufficient. Saying no respirator is required contradicts labeling requirements for Toxicity Class 1 products. A full-face respirator with P100 filters only covers particulates and does not provide the necessary vapor protection unless it's paired with an organic vapor cartridge, which the option described does not.