how many substances are found in Coal Tar
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Composition. Coal tar is produced through thermal destruction (pyrolysis) of coal. Its composition varies with the process and type of coal used – lignite, bituminous or anthracite. Coal tar contains approximately 10,000 chemicals, of which only about 50% have been identified.
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10,000 chemicals are found in coal tar but only some of them has been identified means 50 percent
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