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 Guide: 1001 116

NIOSH Pocket Guide to Chemical Hazards, Acetylene: chemical description, physical properties, potentially hazardous incompatibilities, and more.

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

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

Date Last Revised: 02/12/2003

Literature Basis:

• NIOSH Pocket Guide to Chemical Hazards. Acetylene.

On-Site Sampling Techniques/Methods:

• device: 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)
  


• device: 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)
  
  
• device: 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)
  

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