Formula: C4H6 | CAS: 106-99-0

Detecting butadiene: Studies have consistently shown an association between occupational exposure to 1,3-butadiene and an increased incidence of leukaemia.

Detecting butadiene to limit exposure risks

Exposure to 1,3-butadiene mainly occurs among workers who breath contaminated air on the job. Other sources of exposure include automobile exhaust; tobacco smoke; and polluted air and water near chemical, plastic, or rubber facilities.

Workers who are present in the below industries could be more liable to high exposure levels;

  • synthetic elastomer (rubber and latex) production
  • petroleum refining
  • secondary lead smelting
  • water treatment
  • agricultural fungicides
  • production of raw material for nylon, and the use of fossil fuels.

1,3-butadiene is known to be a human carcinogen based on sufficient evidence of carcinogenicity from studies in humans, including epidemiological and mechanistic studies. 1,3-butadiene was first listed in the Fifth Annual Report on Carcinogens in 1989 as reasonably anticipated to be a human carcinogen based on sufficient evidence of carcinogenicity from studies in experimental animals. The listing was revised, known to be a human carcinogen in the Ninth Report on Carcinogens in 2000.
– NTP Classification

What happens to 1,3-butadiene when it enters the environment?

1,3-butadiene has high volatility and low-water solubility. When released to the environment from industrial or non-industrial sources, butadiene evaporates to the air, even from water and soil; and butadiene breaks down quickly in sunlight and degrades in the air with a half-life of less than two hours. Environmental sources include industrial releases from butadiene production and use, automobile exhaust, cigarette smoke and other combustion sources.

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Gas Factsheet

Everything you need to know about detecting butadiene

Our Gas Factsheets which is available to download below provides you with key information on the exposure limits and the locations of where potentially harmful gases can occur. We also share information on gas detection monitoring techniques and equipment that can help you manage gas detection in the workplace, for worker and site safety.

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Detecting Butadiene

Formula: C4H6 | CAS: 106-99-0

Synonyms: buta-1,3-diene, biethylene, bivinyl, butadiene, divinyl, erythrene, vinylethylene

Specification Value/Information
Formula C4H6
CAS no. 106-99-0
Gas Response Factor, 11.7 eV 1.1
Gas Response Factor, 10.6 eV 0.8
Gas Response Factor, 10.0 eV 0.8
ppm per mg/m⁻³, (20 °C, 1 bar) 0.445
Molecular Weight, g/mole 54.1
Melting point, °C '-109
Boiling point, °C '-5
Specification Value/Information
Flash point, °C '-76 (aq)
Upper Explosive Limit, % 12
Lower Explosive Limit, % 2
Density,⁻³ 0.6149
Ionisation Energy, eV 9.07
EH40 TWA, ppm 10
EH40 TWA, mg.m⁻³ 22
NIOSH IDLH, ppm 2000

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