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pentanal

n. (context chemistry English) An alkyl aldehyde with molecular formula C5H10O, used in flavourings, resin chemistry, and rubber accelerators.

Wikipedia
Pentanal

Pentanal, also called pentanaldehyde or valeraldehyde, is an alkyl aldehyde, molecular formula CHO. It is used in flavorings, resin chemistry, and rubber accelerators.