Polycyclicaromatic hydrocarbons

Hydrocarbons are very minor components of oils and fats but are of dietary and legislative interest. They include alkanes, alkenes such as squalene and carotenes, and polycyclicaromatic hydrocarbons. Squalene (C30H50) is a highly unsaturated open-chain triterpene. It is used in the cosmetic industry after hydrogenation to squalane (C30H62). The most abundant source of squalene is the liver oil of the deep-sea dogfish (Squalus acanthus—hence the name squalene) and some other marine species. Vegetable sources of potential interest include olive oil and amar-anthus (Section 6). 

Alkani Alkanol o Alkylbeniena 4 Polymethylbenzene Polychlorpbenzene 9 Polycyclicaromatic hydrocarbon... 

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