Common names of aldehydes are derived from corresponding carboxylic acids by replacing “-ic” with “aldehyde.” They often reflect the original source of the acid and indicate the location of substituents with Greek letters.
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Common names of aldehydes are often derived from the names of the corresponding carboxylic acids. For example, the common name for the aldehyde derived from formic acid (HCOOH) is “formaldehyde.” Similarly, the aldehyde derived from acetic acid (CH₃COOH) is named “acetaldehyde.” These names convey information about the parent carboxylic acid and the substitution of a hydrogen atom on the carboxyl group with an alkyl or aryl group in the aldehyde. The common names provide a convenient and systematic way to identify and describe aldehydes based on their relationship to carboxylic acids.