Gas-Phase Chemistry of Citronellol with Ozone and OH Radical: Rate Constants and Products

Details

• Personal Author:
  Ham JE ; Proper SP ; Wells JR
• Description:
  A bimolecular rate constant, kOH+citronellol, of (170 +/- 43)×10-12 cm3 molecule-1 s-1 was measured using the relative rate technique for the reaction of the hydroxyl radical (OH) with 3,7-dimethyl-6-octen-1-ol (citronellol) at (297 +/- 3) K and 1 atmosphere total pressure. Additionally, a bimolecular rate constant, kO3+citronellol, of (2.4 +/- 0.1)×10-16 cm3 molecule-1 s-1, was measured by monitoring the decrease in ozone (O3) concentration in an excess of citronellol. To more clearly define part of citronellol's indoor environment degradation mechanism, the products of the citronellol+OH and citronellol+O3 reactions were also investigated. The positively identified citronellol/OH and citronellol/O3 reaction products were: acetone, ethanedial (glyoxal, HC(O)C(O)H), and 2-oxopropanal (methylglyoxal, CH3C(O)C(O)H). The use of derivatizing agents O-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine (PFBHA) and N,O-bis(trimethylsilyl) trifluoroacetamide (BSTFA) were used to propose 6-hydroxy-4-methylhexanal as the other major citronellol/OH and citronellol/O3 reaction product. The elucidation of this other reaction product was facilitated by mass spectrometry of the derivatized reaction products coupled with plausible citronellol/OH and citronellol/O3 reaction mechanisms based on previously published volatile organic compound/OH and volatile organic compound/O3 gas-phase reaction mechanisms. Description provided by NIOSH
• Subjects:
  • Chemistry
  • Environmental Health
  • Occupational Health
  • Safety
• Keywords:
  • Organic-chemicals
  • Organic-compounds
  • Environmental-factors
  • Gases
  • Chemical-reactions
• ISSN:
  1352-2310
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  Michigan ; OSHA Region 3 ; OSHA Region 5 ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  HELD - Health Effects Laboratory Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  40
• Issue:
  4
• NIOSHTIC Number:
  nn:20029759
• Citation:
  Atmos Environ 2006 Feb; 40(4):726-735
• Contact Point Address:
  Exposure Assessment Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV 26505, USA
• Federal Fiscal Year:
  2006
• NORA Priority Area:
  Work Environment and Workforce: Indoor Environment
• Peer Reviewed:
  True
• Source Full Name:
  Atmospheric Environment
• Download URL:
  https://stacks.cdc.gov/view/cdc/190676/cdc_190676_DS1.pdf
• File Type:
  [PDF - 251.12 KB]
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:1aee10640c3db53aab246bc04598c660dc932a19c5c5626dae68850261419cb1adcc2552a5849dd691b3a26cfadcf90fdf0d44ed91b2fa8302afbc16f926a848