Acetylene
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Synonyms & Trade Names
Ethine, Ethyne [Note: A compressed gas used in the welding & cutting of metals.]Exposure Limits
NIOSH REL
C 2500 ppm (2662 mg/m3)OSHA PEL
nonePhysical Description
Colorless gas with a faint, ethereal odor. [Note: Commercial grade has a garlic-like odor. Shipped under pressure dissolved in acetone.]Molecular Weight
26.0Boiling Point
SublimesFreezing Point
-119°F (Sublimes)Solubility
2%Vapor Pressure
44.2 atmIonization Potential
11.40 eVFlash Point
NA (Gas)Upper Exposive Limit
100%Lower Explosive Limit
2.5%Relative Gas Density
0.91
Flammable Gas
Incompatibilities & Reactivities
Zinc; oxygen & other oxidizing agents such as halogens [Note: Forms explosive acetylide compounds with copper, mercury, silver & brasses (containing more than 66% copper).]Exposure Routes
inhalation, skin and/or eye contact (liquid)Symptoms
headache, dizziness; asphyxia; liquid: frostbiteTarget Organs
central nervous system, respiratory systemPersonal Protection/Sanitation
(See protection codes)Skin:Frostbite
Eyes:Frostbite
Wash skin:No recommendation
Remove:When wet (flammable)
Change:No recommendation
Provide:Frostbite wash
Respirator Recommendations
Not available.
- Page last reviewed:April 11, 2016
- Page last updated:April 11, 2016
- Content source:
- National Institute for Occupational Safety and Health (NIOSH) Education and Information Division