What is meant by polynuclear aromatic hydrocarbons?

What is meant by polynuclear aromatic hydrocarbons?

A polynuclear aromatic hydrocarbon is a hydrocarbon made up of fused aromatic ring molecules. These rings share one or more sides and contain delocalized electrons. Polynuclear aromatic hydrocarbon molecules contain only carbon and hydrogen atoms.

Are polynuclear aromatic hydrocarbons linked to cancer?

Long-term exposure to low levels of some PAHs have caused cancer in laboratory animals. Benzo(a)pyrene is the most common PAH to cause cancer in animals. Studies of workers exposed to mixtures of PAHs and other compounds have noted an increased risk of skin, lung, bladder, and gastrointestinal cancers.

How many PAH compounds are there?

PAHs. PAHs, which contain two or more fused aromatic rings, constitute a broad family of compounds, many of which are mutagens and carcinogens. More than 100 different PAHs have been identified in environmental samples and 16 PAHs (Table 2) are generally measured in most exposure and environmental air pollution studies …

Which is the example of polynuclear aromatic hydrocarbon?

Polycyclic aromatic hydrocarbons (PAHs) are a class of chemicals that occur naturally in coal, crude oil, and gasoline. They also are produced when coal, oil, gas, wood, garbage, and tobacco are burned. PAHs generated from these sources can bind to or form small particles in the air.

What does PAHs stand for?

Polycyclic aromatic hydrocarbons
Polycyclic aromatic hydrocarbons (PAHs) are a class of chemicals that occur naturally in coal, crude oil, and gasoline. They also are produced when coal, oil, gas, wood, garbage, and tobacco are burned. PAHs generated from these sources can bind to or form small particles in the air.

Do aromatic compounds cause cancer?

Excessive exposure to polycyclic aromatic hydrocarbons (PAHs) often results in lung cancer, a disease with the highest cancer mortality in the United States.

What are polynuclear hydrocarbons give examples?

Hydrocarbon molecule with two or more closed rings; examples are naphthalene, C10H8, with two benzene rings side by side, or diphenyl, (C6H5)2, with two bond-connected benzene rings. Also known as polycyclic hydrocarbon.

Is 2 methylnaphthalene a PAH?

2-Methylnaphthalene (CASRN 91-57-6) is a polycyclic aromatic hydrocarbon (PAH), consisting of two-fused aromatic rings with a methyl group attached on one of the rings at the number two carbon (Figure 1).