Retene

Retene.svg

Retene is a polycyclic aromatic hydrocarbon (PAH) with the chemical formula C₁₈H₁₈. It is also known as 1-methyl-7-isopropylphenanthrene. Retene is primarily formed through the thermal degradation of conifer resins and is commonly found in wood smoke and coal tar.

Chemical Properties

Retene is a solid at room temperature and has a melting point of approximately 98-100°C. It is relatively insoluble in water but soluble in organic solvents such as benzene, toluene, and chloroform. The structure of retene consists of three fused benzene rings with a methyl group and an isopropyl group attached.

Sources and Formation

Retene is predominantly formed from the pyrolysis of conifer resins, which are rich in terpenes. It is often found in the environment as a result of forest fires, wood burning, and the combustion of fossil fuels. Retene can also be detected in sediments and soils near areas with significant industrial activity.

Environmental Impact

As a polycyclic aromatic hydrocarbon, retene is of environmental concern due to its persistence and potential toxicity. PAHs, including retene, can be harmful to aquatic life and may pose risks to human health through inhalation or ingestion of contaminated water and food.

Health Effects

Exposure to retene, like other PAHs, can lead to various health issues. It is considered a potential carcinogen and may cause respiratory problems upon inhalation. Long-term exposure to PAHs has been linked to lung cancer, skin cancer, and other health conditions.

Analytical Methods

Retene can be detected and quantified using various analytical chemistry techniques. Common methods include gas chromatography (GC) coupled with mass spectrometry (MS) and high-performance liquid chromatography (HPLC). These techniques allow for the precise measurement of retene concentrations in environmental samples.

Applications

While retene itself does not have significant commercial applications, its presence is often used as a marker for the combustion of coniferous materials. It is also studied in environmental science and toxicology to understand the impact of PAHs on the environment and human health.

See Also

• Polycyclic aromatic hydrocarbon
• Benzene
• Toluene
• Chloroform
• Gas chromatography
• Mass spectrometry
• High-performance liquid chromatography