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Acetylene

General Description

  • Synonyms: Ethine, Ethyne [Note: A compressed gas used in the welding & cutting of metals.]
  • OSHA IMIS Code Number: 0070
  • Chemical Abstracts Service (CAS) Registry Number: 74-86-2
  • NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: AO9600000
  • Department of Transportation Regulation Number (49 CFR 172.101) and Emergency Response Guidebook: 1001 116
  • NIOSH Pocket Guide to Chemical Hazards, Acetylene: chemical description, physical properties, potentially hazardous incompatibilities, and more.

Exposure Limits

  • OSHA Permissible Exposure Limit (PEL):
    • Construction Industry: 29 CFR 1926.55 Appendix A -- Simple Asphyxiants. The limiting factor is the available oxygen which shall be at least 19.5 percent and be within the requirements addressing explosion in part 1926.
    • Maritime: 29 CFR 1915.1000 Table Z-Shipyards -- Simple Asphyxiants. The limiting factor is the available oxygen which shall be at least 18 percent and be within the requirements addressing explosion in subpart B of part 1915.
  • American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): Simple Asphyxiant
  • National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 2500 ppm, 2662 mg/m3 Ceiling

Health Factors

  • NIOSH Immediately Dangerous To Life or Health Concentration (IDLH): Not determined
  • Potential Symptoms: CNS, cardiac and respiratory symptoms related to oxygen deficiency: Headache, dizziness, reduced visual acuity, poor judgment, memory and coordination; weakness, unconsciousness; rapid pulse and respiration, cyanosis; frostbite from contact with liquid form
  • Health Effects: Explosive, Flammable, Safety-No adverse effects encountered when Good Housekeeping Practices are followed (HE18); Asphyxiation (HE17)
  • Affected organs: CNS, respiratory system
  • Literature Basis:
    • NIOSH Pocket Guide to Chemical Hazards. Acetylene.
  • Date Last Revised: 02/12/2003

Monitoring Methods used by OSHA

On-Site Sampling Techniques/Methods:
  • Detector Tube
  • manufacturer: Dräger
  • model/type: Hydrocarbons 0.1%/b, order no. CH 26101
  • sampling information: consult manufacturer
  • upper measurement limit: consult manufacturer
  • detection limit: consult manufacturer
  • overall uncertainty: consult manufacturer
  • method reference: on-site air secondary (manufacturer)
  • Detector Tube
  • manufacturer: Matheson-Kitagawa
  • model/type: 8014-101S
  • sampling information: follow manufacturer's instructions
  • upper measurement limit: 1000 ppm
  • detection limit: approximately 50 ppm
  • overall uncertainty: unknown
  • method reference: on-site air secondary (manufacturer)
  • Detector Tube
  • manufacturer: Gastec
  • model/type: 171
  • sampling information: 0.5 to 2 strokes
  • upper measurement limit: 4.0%
  • detection limit: 0.02%
  • overall uncertainty: 24.6% for 0.1 to 0.5%, 16.4% for 0.5 to 2%
  • method reference: on-site air secondary (manufacturer)

** All Trademarks are the property of their respective owners.

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