Citronellal Reactions with Ozone and OH Radical: Rate Constants and Gas-Phase Products Detected Using PFBHA Derivatization

Details

• Personal Author:
  Ham JE ; Harrison JC ; Wells JR
• Description:
  The bimolecular rate constants, kOH+citronellal, (150+/-40)×10-12 cm3 molecule-1 s-1 and, kO3+citronellal, (3.5+/-1.2)×10-16 cm3 molecule-1 s-1, were measured using the relative rate technique for the reactions of the hydroxyl radical (OH) and ozone (O3) with 3,7-dimethyl-6-octen-1-al ((R)-(+)-citronellal) at (297+/-3) K and 1 atm total pressure. To more clearly define part of citronellal's indoor environment degradation mechanism, the products of the citronellal+OH and citronellal+O3 reactions were also investigated. The positively identified citronellal/OH and citronellal/O3 reaction products were: 3-methylhexanedial HC(O)CH2CH2CH(CH3)CH2C(O)H and 2-oxopropanal (methylglyoxal, CH3C(O)C(O)H). The use of derivatizing agent O-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine (PFBHA) was used to propose 3-methylhexanedial as a major citronellal/OH and citronellal/O3 reaction product. The elucidation of this reaction product was facilitated by mass spectrometry of the derivatized reaction products coupled with plausible citronellal/OH and citronellal/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 Exposure Environmental Health Environmental Pollution Occupational Health Respiratory System Safety
• Keywords:
  Analytical-processes Chemical-analysis Chemical-composition Chemical-indicators Chemical-properties Chemical-reactions Environmental-exposure Environmental-factors Environmental-pollution Exposure-levels Exposure-methods Gas-detectors Gas-meters Gas-mixtures Inhalation-studies

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• ISSN:
  1352-2310
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; 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:
  41
• Issue:
  21
• NIOSHTIC Number:
  nn:20032326
• Citation:
  Atmos Environ 2007 Jul; 41(21):4482-4491
• Contact Point Address:
  JR Wells, Exposure Assessment Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, 1095 Willowdale Road Morgantown, WV 26505
• Email:
  ozw0@cdc.gov
• CAS Registry Number:
  Ozone (CAS RN 10028-15-6)
• Federal Fiscal Year:
  2007
• Peer Reviewed:
  True
• Source Full Name:
  Atmospheric Environment
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:4f434b973f95c2ae2cf8880b06b6569b4de3159173921a081f88d77f907c957a7d9737de6f0b78273178b582f46ce288d8474723e136027fc287d7dcbae22be9
• Download URL:
  https://stacks.cdc.gov/view/cdc/186347/cdc_186347_DS1.pdf
• File Type:
  [PDF - 224.59 KB ]