The pungent taste and scent come from cinnamaldehyde, about 90% of the essential oil from cinnamon bark. Cinnamaldehyde decomposes, in high humidity and high temperatures, to styrene, and, by reaction with oxygen as it ages, it darkens in colour and forms resinous compounds.
the pungent taste and scent come from cinnamaldehyde about 90% of the essential oil from cinnamon bark cinnamaldehyde decomposes in high humidity and high temperatures to styrene and by reaction with oxygen as it ages it darkens in colour and forms resinous compounds