Articles | Volume 23, issue 22
Research article
14 Nov 2023
Research article |  | 14 Nov 2023

Atmospheric impact of 2-methylpentanal emissions: kinetics, photochemistry, and formation of secondary pollutants

María Asensio, Sergio Blázquez, María Antiñolo, José Albaladejo, and Elena Jiménez

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Subject: Gases | Research Activity: Laboratory Studies | Altitude Range: Troposphere | Science Focus: Chemistry (chemical composition and reactions)
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Cited articles

Aisala, H., Sola, J., Hopia, A., Linderborg, K. M., and Sandell, M.: Odor-contributing volatile compounds of wild edible Nordic mushrooms analyzed with HS–SPME–GC–MS and HS–SPME–GC–O/FID, Food Chem., 283, 566–578,, 2019. 
Albaladejo, J., Ballesteros, B., Jiménez, E., Martıìn, P., and Martıìnez, E.: A PLP–LIF kinetic study of the atmospheric reactivity of a series of C4–C7 saturated and unsaturated aliphatic aldehydes with OH, Atmos. Environ., 36, 3231-3239,, 2002. 
Antiñolo, M., González, S., Ballesteros, B., Albaladejo, J., and Jiménez, E.: Laboratory Studies of CHF2CF2CH2OH and CF3CF2CH2OH: UV and IR Absorption Cross Sections and OH Rate Coefficients between 263 and 358 K, J. Phys. Chem. A, 116, 6041–6050,, 2012. 
Antiñolo, M., del Olmo, R., Bravo, I., Albaladejo, J., and Jiménez, E.: Tropospheric fate of allyl cyanide (CH2= CHCH2CN): Kinetics, reaction products and secondary organic aerosol formation, Atmos. Environ., 219, 117041,, 2019. 
Antiñolo, M., Asensio, M., Albaladejo, J., and Jiménez, E.: Gas-Phase Reaction of trans-2-Methyl-2-butenal with Cl: Kinetics, Gaseous Products, and SOA Formation, Atmosphere, 11, 715,, 2020. 
Short summary
In this work, we focus on the atmospheric chemistry and consequences for air quality of 2-methylpentanal (2MP), which is widely used as a flavoring ingredient and as an intermediate in the synthesis of dyes, resins, and pharmaceuticals. Measurements are presented on how fast 2MP is degraded by sunlight and oxidants like hydroxyl (OH) radicals and chlorine (Cl) atoms and what products are generated. We conclude that 2MP will be degraded in a few hours, affecting local air quality.
Final-revised paper