pro·pi·on·aldehyde
| \ ¦prōpēˌän+ \
Definition of propionaldehyde
: a volatile pungent liquid aldehyde C2H5CHO made usually by dehydrogenation of propyl alcohol or as a by-product in the Fischer-Tropsch synthesis of higher hydrocarbons and used in organic synthesis
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Merriam-Webster unabridged
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