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Is acetylene a toxic gas?


The chemical substance having the formula C2H2 is acetylene, also known by its scientific name, ethyne. It is the most basic alkyne and a hydrocarbon.  This colorless gas is frequently utilized as a fuel and a component of chemical compounds. Since it is unstable in its pure state, a solution is typically used. Although commercial grades of acetylene typically have a noticeable odor due to impurities like divinyl sulfide and phosphine, pure acetylene is odorless.



Is acetylene a toxic gas?

Acetylene Gas Toxicity

1.      Vapors might unexpectedly cause asphyxiation or dizziness.

2.     Some could be harmful if inhaled in large quantities.

3.     Gas or liquefied gas contact can result in frostbite, severe damage, and/or burns.

4.     Gases that are poisonous or irritant may be produced by fire.


Public Safety

1.      Keep unauthorised people at a distance.

2.     Stay upstream, uphill, or both.

3.     Many gases will spread down the ground and gather in low or limited regions because they are heavier than air (sewers, basements, tanks, etc.)

4.     Put on a positive pressure, self-contained breathing device (SCBA).

5.     The protective gear worn by structural firefighters offers little heat protection but no chemical protection at all.

6.     Set a spill or leak region off from surrounding areas by at least 100 meters (330 ft).

7.      At least 800 meters (1/2 mile) of initial downwind evacuation should be considered.



Explosion or Fire of acetylene Gas

1.      will burn, spark, or heat readily ignite it.

2.     with air, will produce explosive combinations. Even in the absence of air, acetylene (UN1001, UN3374) can react explosively.

3.     Silane (UN2203), when exposed to air, will ignite on its own.

4.     When heated or exposed to fire, compounds marked with a (P) may polymerize explosively.

5.     Liquid gas vapors initially weigh more than air and spread across the ground.

6.     Vapors could travel to the ignite source and then flash back.

7.      Through pressure relief systems, cylinders exposed to fire may vent and emit dangerous gas.

8.     Containers that are heated may blow up.

9.     Cylinder ruptures may launch.



Public Safety


2.     Dry chemical or CO2.

3.     Water spray or fog.

4.     If it can be done safely, move undamaged containers away from the area around the fire.

5.     Fire Involving Tanks

6.     Fight fire from maximum distance or use unmanned master stream devices or monitor nozzles.

7.      Cool containers with flooding quantities of water until well after fire is out.

8.     Do not direct water at source of leak or safety devices; icing may occur.

9.     Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank.

10.  ALWAYS stay away from tanks engulfed in fire.

11.    For massive fire, use unmanned master stream devices or monitor nozzles; if this is impossible, withdraw from area and let fire burn.

12.   If a tank, rail car, or tank truck is on fire, you should isolate the area for 1600 meters (1 mile) in all directions and think about doing a preliminary evacuation as well.



Health Effects

A) No Specific Review Has Been Prepared On The Clinical Effects And Treatment Of Patients Exposed To This Agent. The Following Deals With The General Evaluation And Treatment Of People Who Have Been Exposed To Possibly Harmful Chemicals.



A comprehensive medical history and physical examination should be undertaken on exposed persons to search for any anomalies. Strong-smelling chemical exposure frequently causes such vague symptoms as nausea, weakness, and headaches.



1.      A lot of chemicals might irritate the skin, eyes, and respiratory system. When respiratory tract irritation is severe, it can lead to ARDS/acute lung injury, which can sometimes take up to 24 to 72 hours to manifest.

2.     If caustic or irritating chemicals are swallowed, the esophagus or digestive tract may become irritated or burn.



1.      When exposed repeatedly, a number of chemical substances cause allergic hypersensitivity dermatitis or asthma with bronchospasm and wheezing.