Known commercially as methyl chloroform, 1,1,1-trichloroethane was widely used as an industrial solvent before its phase-out under the Montreal Protocol due to its ozone-depleting potential. Mixtures containing this substance are subject to EPA ODS import controls, and the sharp decline in legitimate production globally means that trade in these blends is now largely limited to recycled or recovered material for authorized uses. Because this heading has no children in the current US tariff schedule, importers should seek a CBP binding ruling to confirm the correct 10-digit classification.

AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.