Nomenlature of Aldehydes

Aldehydes have the -CHO functional group (recommendation C-301.1). They are named from the hydrocarbon with the same number of carbon atoms ending in –al (recommendation C-301.2). When the -CHO group acts as a substituent, the prefix formyl or carbaldehyde is used (recommendations C-303.1 and C-304.1).

The most common aldehydes retain a common name derived from the carboxylic acid of the same number of carbons ending in aldehyde (recommendations C-305.1 and C-305.3).

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