2-Nonenal

2-Nonenal

2-Nonenal is an organic compound that is classified as an alkenal. It is a colorless liquid with a distinctive odor. The compound is most commonly associated with the smell of human aging, but it is also found in various foods and beverages.

Chemical Structure

2-Nonenal has the chemical formula C₉H₁₆O. It is a nine-carbon chain with a double bond between the second and third carbons from the end of the chain, and an oxygen atom double-bonded to the end carbon. This structure is typical of alkenals, which are a type of unsaturated fatty acid.

Occurrence

2-Nonenal is produced naturally in the human body as a result of the oxidation of lipids. The concentration of 2-nonenal in the body increases with age, leading to its association with the smell of aging. It is also found in various foods and beverages, including beer, bread, and fried foods.

Health Effects

While 2-nonenal is not considered harmful in small amounts, exposure to high concentrations can cause irritation of the eyes, skin, and respiratory tract. It is also a potential allergen.

See Also

• Aldehyde
• Lipid peroxidation
• Oxidative stress