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Chemical Sampling Information (CSI)
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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 Guide: 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:

  • 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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