butadiene

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butadiene

A conjugated diene gas released during the production of synthetic rubber and adiponitrile, an intermediate in nylon production. Short-term exposure causes irritation of mucous membranes, blurred vision, fatigue, headache and dizziness. Long-term exposure to 1+ ppm is cardiotoxic, and increases the risk of leukaemia and other cancer.
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After 2 wk of acclimation, the mice (9-13 wk of age) were randomly allocated to a control group exposed to clean air or to an experimental group exposed to 1,3-butadiene for 6 h a day, Monday-Friday, across a 2-wk period (and returned to their respective cages following each exposure).
FTIR analyzer is capable of measuring 24 unregulated emission pollutants such as carbon monoxide (CO), carbon dioxide (CO2), nitric oxide (NO), nitrogen dioxide (NO2), nitrous oxide (N2O), water (H2O), ammonia (NH3), sulfur dioxide (SO2), formaldehyde (HCHO), acetaldehyde (CH3CHO), formic acid (HCOOH), acetic acid (CH3COOH), methanol (CH3OH), ethanol (C2H5OH), methane (CH4), Acetylene (C2H2), ethylene (C2H4), ethane (C2H6), propene (C3H6), propane (C3H8), 1,3-Butadiene (C4H6), iso-butene (C4H8), benzene (C6H6), toluene (C7H8) etc.
For all the pollutants, urban streets are characterised by higher uncertainty in the emissions achieving the largest range for 1,3-butadiene (-33% to +70 %), while estimations for highways are more robust.
i] represents the independent polymerization variables (DEAC/Nd ratio, reaction temperature, catalyst concentration, and 1,3-butadiene concentration), [y.
Henry's law constants and infintite dilution activity coefficients of propane, propene, butane, 2-methylpropane, 1-butene, 2-methylpropene, trans-2-butene, cis-2-butene, 1,3-butadiene, dimethyl ether, chloroethane, and 1,1-difluoroethane in 2-propen-l-ol.
Evaporative emissions of 1,3-butadiene from petrolfuelled motor vehicles, Atmospheric Environment 32(14 15): 2685-2692.
To get an idea on the propagation rate of the polymerization of 1,3-butadiene with A1/Li/Ba/cyclohexane solutions a series of polymerizations was carried out by keeping constant the catalyst composition (1:1:0.
1,3-butadiene studies have shown the possibility that this can cause lymphomas and leukaemia, though ambient levels are not harmful.
According to the Union of Concerned Scientists' report, the airborne concentration of 1,3-butadiene, which causes cancer and a host of neurological issues, is more than 150 times greater in Manchester and Harrisburg than in West Oaks and Eldridge, relatively affluent neighborhoods on Houston's west side.
Key statement: Provided is a copolymer of a conjugated diene compound and a non-conjugated olefin, the copolymer being a block copolymer, the conjugated diene compound unit having 1,2 adduct (including 3,4 adduct) content of 5% or less or the conjugated diene compound unit having a cis-1,4 bond content of more than 92%, in which preferred examples of the conjugated diene compound include 1,3-butadiene and isoprene, and preferred examples of the non-conjugated olefin include ethylene, propylene and 1-butene.
The government said, the new company, which will make seven products including propylene, ethylene, and 1,3-butadiene, will be required to provide those products to Taiwan as necessary.
Possible risk factors include nighttime shift work and exposure to secondhand smoke, benzene, ethylene oxide, and 1,3-butadiene.