Acrolein
Chemical compound
Acrolein is the simplest unsaturated aldehyde. It is a colorless liquid with a foul and acrid aroma. The smell of burnt fat is caused by glycerol in the burning fat breaking down into acrolein. Wikipedia
Formula: C3H4O
Molar mass: 56.06 g/mol
Boiling point: 127.4°F (53°C)
Classification: Aldehyde