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  2. Coal tar - Wikipedia

    en.wikipedia.org/wiki/Coal_tar

    Coal tar is produced through thermal destruction of coal.Its composition varies with the process and type of coal used – lignite, bituminous or anthracite. [13]Coal tar is a mixture of approximately 10,000 chemicals, of which only about 50% have been identified.

  3. Tar - Wikipedia

    en.wikipedia.org/wiki/Tar

    Tar made from coal or petroleum is considered toxic and carcinogenic because of its high benzene content, [citation needed] though coal tar in low concentrations is used as a topical medicine for conditions such as psoriasis. [11] [12] Coal and petroleum tar has a pungent odor. Coal tar is listed at number 1999 in the United Nations list of ...

  4. Pitch (resin) - Wikipedia

    en.wikipedia.org/wiki/Pitch_(resin)

    Pitch is a viscoelastic polymer which can be natural or manufactured, derived from petroleum, coal tar, [1] or plants. Pitch produced from petroleum may be called bitumen or asphalt , while plant-derived pitch, a resin , is known as rosin in its solid form.

  5. Coal tar in Newtown: How it was found decades ago and why ...

    www.aol.com/coal-tar-newtown-found-decades...

    The gasification of coal created a tar-like material, which traveled through wastewater under Bramlett Road to be discharged into the flood plain across the street.

  6. Bituminous waterproofing - Wikipedia

    en.wikipedia.org/wiki/Bituminous_waterproofing

    Bitumen (asphalt or coal-tar pitch) is a material made up of organic liquids that are highly sticky, viscous, and waterproof. [1] Systems incorporating bituminous-based substrates are sometimes used to construct roofs, in the form of "roofing felt" or "roll roofing" products.

  7. History of manufactured fuel gases - Wikipedia

    en.wikipedia.org/wiki/History_of_manufactured...

    As the wastes produced by former manufactured gas plants were persistent in nature, they often (as of 2009) still contaminate the site of former manufactured gas plants: the waste causing the most concern today is primarily coal tar (mixed long-chain aromatic and aliphatic hydrocarbons, a byproduct of coal carbonization), while "blue billy" (a ...

  8. Bituminous coal - Wikipedia

    en.wikipedia.org/wiki/Bituminous_coal

    Bituminous coal. Bituminous coal, or black coal, is a type of coal containing a tar-like substance called bitumen or asphalt. Its coloration can be black or sometimes dark brown; often there are well-defined bands of bright and dull material within the seams. It is typically hard but friable.

  9. Naphthalene - Wikipedia

    en.wikipedia.org/wiki/Naphthalene

    From the 1960s until the 1990s, significant amounts of naphthalene were produced from heavy petroleum fractions during refining, but present-day production is mainly from coal tar. [citation needed] Approximately 1.3 million tons are produced annually. [citation needed] Naphthalene is the most abundant single component of coal tar.