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Coal tar is a thick dark liquid which is a by-product of the production of coke and coal gas from coal. [2] [3] It is a type of creosote. It has both medical and ...
Coal-tar creosote is the most widely used wood treatment today; both industrially, processed into wood using pressure methods such as "full-cell process" or "empty-cell process", and more commonly applied to wood through brushing. In addition to toxicity to fungi, insects, and marine borers, it serves as a natural water repellent.
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 ...
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The main active ingredient are phenols (26%), coal tar neutral oils (51%), soaps (13%) and water (10%) . The main toxicity of this product is that of phenols, which are non-specific cellular toxins causing damage to the gastrointestinal, hepatic, renal and neurological systems. [10]
Benzo[a]pyrene (BaP) is a polycyclic aromatic hydrocarbon found in coal tar with the formula C 20 H 12. The compound is one of the benzopyrenes , formed by a benzene ring fused to pyrene , and is the result of incomplete combustion at temperatures between 300 °C (572 °F) and 600 °C (1,112 °F).
Until the late 1950s coal tar was the principal source of naphthalene. From 1981 to 1983 the U.S. National Institute for Occupational Safety and Health found over 100,000 workers were potentially exposed to toxic levels of naphthalene, working primarily for major industrial and agricultural businesses.
A Lake Norman woman who developed kidney cancer sued Duke Energy on Wednesday over its disposal of toxic coal ash near and beneath lake-area homes and businesses in the 1990s and 2000s.