Atmospheric reactivity of gaseous dimethyl sulfate

S. M. Japar, T. J. Wallington, Jean M. Andino, J. C. Ball

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The atmospheric reactivity of dimethyl sulfate (DMS) with a series of atmospheric species has been investigated. Upper limits to the rate constants for the homogeneous gas-phase reactions of DMS with O3, NH3, and H2O have been determined by using FTIR spectroscopy and are -21, -21, and -23 cm3 molecule-1 S-1, respectively. The reactivity of DMS toward OH radicals and Cl atoms has been determined by using relative rate techniques, and the rate constants for those reactions are -13 and (4.2 ± 0.5) X 10-13 cm3 molecule-1 S-1, respectively. These rate constants correspond to atmospheric lifetimes ranging from >23 days with respect to reaction with OH radicals to >33 years with respect to reaction with ozone. With the possible exception of its reaction with water, for which the calculated lifetime of DMS is >2 days, these results indicate that the atmospheric fate of DMS is not determined by its homogeneous gas-phase reactions with any of the atmospheric species studied.

Original languageEnglish
Pages (from-to)313-315
Number of pages3
JournalEnvironmental Science and Technology
Volume24
Issue number3
DOIs
Publication statusPublished - Mar 1990

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Science(all)
  • Environmental Chemistry
  • Earth and Planetary Sciences(all)

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