Linoleic acid (LA) is a polyunsaturated omega-6 fatty acid. It is a colorless liquid at room temperature. In physiological literature, it has a lipid number of 18:2 cis,cis-9,12. Linoleic acid is a carboxylic acid with an 18-carbon chain and two cis double bonds; with the first double bond located at the sixth carbon from the methyl end. Linoleic acid belongs to one of the two families of essential fatty acids, which means that the human body cannot synthesize it from other food components. The word "linoleic" derived from the Greek word linon (flax). Oleic means "of, relating to, or derived from oil of olive" or "of or relating to oleic acid" because saturating the omega-6 double bond produces oleic acid.
9,12-Octadecadienoic acid (Z,Z)-
Appearance & Physical State
colourless or light yellow liquid
229-230ºC (16 mmHg)
Stability Stable, but air and light sensitive. Combustible. Incompatible with strong oxidizing agents.