StacksVerified U.S. regulatory reference

42 CFR §84.161

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)The completely assembled respirator will be worn in a chamber containing 0.1 ±0.025 percent isoamyl acetate vapor, and the intake of the hose, and not more than 25 percent of the hose length will be located in isoamyl acetate-free air.
  2. (b)The man in the isoamyl acetate atmosphere will draw his inspired air through the hose and connections by means of his lungs alone.