Dipentene DHM is the by-product of the production of gum turpentine derivatives.Synthetic dipentene is the by-product of the production of dihydromyrcene. It appears colorless liquid with lemon odor. It is insoluble in water, miscible with ethanol. Dipentene is mainly composed of terpene hydrocarbons, limonene, beta-Phellandrene, myrcene and other terpenes. It is widely used as a cost-effective ingredient for household products.
Limonene is present in citrus essential oils, where its content can reach up to 90%. (−)-Limonene naturally occurs in pine needle oil, turpentine, cajuput oil, and other essential oils. It is a liquid with an orange-like aroma and is obtained by fractionation from terpenes in orange oil.
Limonene has optical isomers, including L-limonene, R-limonene, and the racemic isomer dipentene.
In flavor formulations for personal care products, the content of limonene can be as high as 30%. Limonene is also mainly used as an intermediate in the synthesis of bergamyl esters, carvone, p-cymene, tonalide, and fantolide.