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The term creosote has a broad range of definitions depending on the origin of the coal tar oil and end-use of the material. With respect to wood preservatives, the United States Environmental Protection Agency (EPA) considers the term creosote to mean a pesticide for use as a wood preservative meeting the American Wood Protection Association (AWPA) Standards P1/P13 and P2. [6]
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 industrial uses.
Creosote is a tar-based preservative that is commonly used for utility poles and railroad ties or sleepers. Creosote is one of the oldest wood preservatives, and was originally derived from a wood distillate , but now, virtually all creosote is manufactured from the distillation of coal tar .
One can produce a tar-like substance from corn stalks by heating them in a microwave oven. This process is known as pyrolysis. Tar is a dark brown or black viscous liquid of hydrocarbons and free carbon, obtained from a wide variety of organic materials through destructive distillation. Tar can be produced from coal, wood, petroleum, or peat. [1]
Coal tar creosote; Wood creosote; Reduction product of vanillin using zinc powder in strong hydrochloric acid (Clemmensen reduction) Found as glycosides in green vanilla beans [2] It is also found in tequila. [3]
Creosote has been used as a wood preservative since the 1800s. [13] [14] Distilled from coal tar and composed of more than 200 aromatic hydrocarbons, creosote was applied to outdoor wood products such as railway ties and utility poles to prevent rotting or consumption by termites and pests. [14]
The wood-tar creosote is commonly called "Nikkyoku creosote" (i.e. Japanese pharmacopoeial creosote) as a means to distinguish from potentially harmful industrial creosote. These recent naming conventions were prompted by a controversy set off by a consumer alert booklet, Katte wa ikenai [ ja ] ( 買ってはいけない , "Should not buy ...
found in coal tar and creosote: Estradiol: estrogen - hormones Eugenol: the main constituent of the essential oil of clove: Gallic acid: found in galls: Guaiacol (2-methoxyphenol) - has a smokey flavor, and is found in roasted coffee, whisky, and smoke: Methyl salicylate: the major constituent of the essential oil of wintergreen: Raspberry ketone