Glyoxal (L2__CHOCHO)

Glyoxal (CHOCHO) serves as a vital indicator for Volatile Organic Compound (VOC) emissions, appearing as a secondary product of VOC oxidation or through direct release during combustion. Because it has a short atmospheric lifetime of only a few hours, it creates concentrated signals near its sources, offering a clear view of production activity. Beyond its role as an emission tracer, CHOCHO contributes to the formation of secondary organic aerosols (SOA), which have significant implications for both local air quality and global climate forcing.