Atmospheric loss processes of 1,2-dibromo-3-chloropropane and trimethyl phosphate

The reactions of 1,2-dibromo-3-chloropropane (DBCP) and trimethyl phosphate with O sub(3) and the OH radical have been investigated at 296 plus or minus 2 K and atmospheric pressure of air by long-path Fourier transform infrared spectroscopic and gas chromatography-mass spectrometry techniques. For...

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Bibliographic Details
Published in:Environmental science & technology 1986-10, Vol.20 (10), p.1043-1046
Main Authors: Tuazon, Ernesto C, Atkinson, Roger, Aschmann, Sara M, Arey, Janet, Winer, Arthur M, Pitts, James N
Format: Article
Language:English
Subjects:
AIR POLLUTION
Chemistry
COMPOSE ORGANOPHOSPHORE
COMPUESTO ORGANICO DEL FOSFORO
CONTAMINACION DEL AIRE
DBCP
Exact sciences and technology
Kinetics and mechanisms
Organic chemistry
ORGANOPHOSPHORUS COMPOUNDS
POLLUTION ATMOSPHERIQUE
Reactivity and mechanisms
TOXICIDAD
TOXICITE
TOXICITY
VOLATILITY
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Summary:The reactions of 1,2-dibromo-3-chloropropane (DBCP) and trimethyl phosphate with O sub(3) and the OH radical have been investigated at 296 plus or minus 2 K and atmospheric pressure of air by long-path Fourier transform infrared spectroscopic and gas chromatography-mass spectrometry techniques. For reaction with O sub(3), upper limits to the rate constants of < 3 x 10 super(-20) cm super(3) molecule super(-1) s super(-1) for 1,2-dibromo-3-chloropropane and < 6 x 10 super(-20) cm super(3) molecule super(-1) s super(-1) for trimethyl phosphate were determined, showing that reaction with O sub(3) is not an important atmospheric loss process for these compounds. With the use of relative rate techniques, OH radical reaction rate constants of 4.4 x 10 super(-13) cm super(3) molecule super(-1) s super(-1) for 1,2-dibromo-3-chloropropane and 7.4 x 10 super(-12) cm super(3) molecule super(-1) s super(-1) for trimethyl phosphate were obtained, leading to calculated tropospheric lifetimes of similar to 55 and similar to 3 days, respectively, for the reactions of these compounds with OH radicals. CH sub(2)BrCOCH sub(2)Cl has been tentatively identified as a product of the reaction of OH radicals with 1,2-dibromo-3-chloropropane.
ISSN:0013-936X
1520-5851
DOI:10.1021/es00152a014