terpinene

Terpinene is a chemical compound that belongs to the monoterpene class of hydrocarbons. Monoterpenes are organic compounds built from isoprene units, and those with 10 carbon atoms, like terpinene, are called monoterpenes. Terpinene exists in three isomeric forms, with alpha- and gamma-terpinene being the most common.123

These isomers are liquid compounds with a characteristic odor, often described as lemony. They are found in various essential oils, including those from coriander and chenopodium. Terpinenes can be obtained through the isomerization of other compounds like pinene. They are volatile and less dense than water, with boiling points typically between 150 and 185 °C.14