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Argon

General Description

  • OSHA IMIS Code Number: 0240
  • Chemical Abstracts Service (CAS) Registry Number: 7440-37-1
  • NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: CF2300000
  • Chemical Description and Physical Properties:
    • odorless, colorless, liquified gas
    • molecular weight: 39.95
    • molecular formula: Ar
    • boiling point: -185.9°C
    • melting point: -189.2°C

Exposure Limits

  • OSHA Permissible Exposure Limit (PEL):
    • 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

Health Factors

  • Potential Symptoms: Dizziness, unconsciousness, asphyxia; skin, eye frostbite (on contact with liquid).
  • Health Effects: Asphyxiation (HE17)
  • Affected Organs: CNS
  • Notes:
    1. Six fatalities from argon-induced asphyxia were reported to OSHA during 2001-2002.
  • Literature Basis:
    • International Chemical Safety Cards (WHO/IPCS/ILO): Argon.
  • Date Last Revised: 07/28/2003

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