{"operation":"document","citation":"49 CFR 173.140","title":"Class 9—Definitions.","source_type":"regulation","agency":"Pipeline and Hazardous Materials Safety Administration","status":"current","official":true,"published_on":null,"effective_on":"2026-08-18","summary":"For the purposes of this subchapter, miscellaneous hazardous material (Class 9) means a material which presents a hazard during transportation but which does not meet the definition of any other hazard class. This class includes:\n\n(a) Any material which has an anesthetic, noxious or other similar pr","machine_formats":{"json":"https://regulus.evalyn.ai/document/49-cfr-173-140.json","markdown":"https://regulus.evalyn.ai/document/49-cfr-173-140.md"},"app_url":"https://regulus.evalyn.ai/document/49-cfr-173-140","source_url":"https://www.ecfr.gov/on/2026-08-18/title-49/section-173.140","body":"For the purposes of this subchapter, miscellaneous hazardous material (Class 9) means a material which presents a hazard during transportation but which does not meet the definition of any other hazard class. This class includes:\n\n(a) Any material which has an anesthetic, noxious or other similar property which could cause extreme annoyance or discomfort to a flight crew member so as to prevent the correct performance of assigned duties; or\n\n(b) Any material that meets the definition in § 171.8 of this subchapter for an elevated temperature material, a hazardous substance, a hazardous waste, or a marine pollutant.\n\n[Amdt. 173-224, 57 FR 45463, Oct. 1, 1992, as amended by Amdt. 173-231, 57 FR 52939, Nov. 5, 1992; Amdt. 173-233, 58 FR 33305, June 16, 1993]","truncated":false,"body_characters":764}