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Coal tar is produced by the carbonization of coal.It is a thick, black, viscous liquid which is a byproduct of the production of coke.It is a fuel that is produced by heating coal in the absence of air. Coal tar contains polycyclic aromatic hydrocarbons (PAHs), which are one type of chemical.

Coal tar is used in a variety of industries, such as the production of roofing materials, pavement sealants, and asphalt. It has also been used in medicinal products to treat skin conditions. It is found in ointments and shampoos. 

Overview of Coal Tars:

Coal tars are thick, black, viscous liquids that are by-products of the carbonization of coal. They are composed of various organic compounds, including polycyclic aromatic hydrocarbons (PAHs), phenols, and heterocyclic compounds. Coal tars have a long history of use in various industrial applications, including the production of roofing materials, pavement sealants, and paints.

Composition of Coal Tars:

Coal tars are complex mixtures of organic compounds. The composition of coal tars varies depending on the type of coal used and the carbonization process employed. Generally, coal tars contain high concentrations of polycyclic aromatic hydrocarbons (PAHs), phenols, heterocyclic compounds, and other organic compounds.

Production of Coal Tars:

Coal tars are produced by the carbonization of coal. This process involves heating coal to high temperatures in the absence of air. The resulting products include coal gas, coke, and coal tar. The coal tar is separated from the other products by cooling and condensation.

Applications of Coal Tars:

Coal tars have many industrial applications, including the production of roofing materials, pavement sealants, and paints. They are also used in the production of synthetic dyes, plastics, and pharmaceuticals. Coal tars have been used as a preservative for wood and as a component of some skin medications.

Health and Environmental Concerns of Coal Tars:

Coal tars contain a variety of potentially harmful compounds, including polycyclic aromatic hydrocarbons (PAHs), which are known to be carcinogenic. Exposure to coal tars has been linked to various health effects, including skin irritation, respiratory problems, and cancer. Coal tar products can also leach into soil and groundwater, leading to environmental contamination. As a result, there are concerns about the use of coal tars in various industrial applications.