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Answer for the clue "A pungent colorless unsaturated liquid aldehyde made from propene ", 8 letters:
acrolein

Word definitions for acrolein in dictionaries

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Acrolein \A*cro"le*in\, n. [L. acer sharp + ol[=e]re to smell.] (Chem.) A limpid, colorless, highly volatile liquid, obtained by the dehydration of glycerin, or the destructive distillation of neutral fats containing glycerin. Its vapors are intensely irritating. ...

Wiktionary Word definitions in Wiktionary
n. (context organic compound English) A pungent, acrid, poisonous liquid aldehyde, CH 2 =CH-CH=O, made by the destructive distillation of glycerol.

Wikipedia Word definitions in Wikipedia
Acrolein (systematic name: propenal ) is the simplest unsaturated aldehyde . It is a colourless liquid with a piercing, disagreeable, acrid smell. The smell of burnt fat (as when cooking oil is heated to its smoke point ) is caused by glycerol in the burning ...

WordNet Word definitions in WordNet
n. a pungent colorless unsaturated liquid aldehyde made from propene [syn: propenal ]