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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]
It is extracted from the dry distillation of wood. The residue remaining in the autoclave vessel is a dark, syrupy mass called creosote, which is composed mainly of phenolic acid and cresylic acid. The original composition of creolin is a creosote tar oil, caustic soda, soaps, and very little water. It is of low technology and a very powerful ...
Tung oil has been used for hundreds of years in China, where it was used as a preservative for wood ships. The oil penetrates the wood, and then hardens to form an impermeable hydrophobic layer up to 5 mm into the wood. As a preservative it is effective for exterior work above and below ground, but the thin layer makes it less useful in practice.
[2] After Henry died in 1928, his company and its competitor, J. M. Colman's creosote company (located in West Seattle), were combined in 1930 to form the West Coast Wood Preserving Company. In 1947, Walter Wyckoff bought out the Colman family's interest and, after joining with J. H. Baxter in 1959, renamed the company the Baxter-Wyckoff Company.
Guaiacol appears as a viscous colorless oil, although aged or impure samples are often yellowish. It occurs widely in nature and is a common product of the pyrolysis of wood. [ 3 ]
Creosol is a chemical compound with the molecular formula C 8 H 10 O 2. It is one of the components of creosote . Compared with phenol , creosol is a less toxic disinfectant .
Chromated copper arsenate (CCA) is a wood preservative containing compounds of chromium, copper, and arsenic, in various proportions. It is used to impregnate timber and other wood products, especially those intended for outdoor use, in order to protect them from attack by microbes and insects. Like other copper-based wood preservatives, it ...
[2] [3] It is a type of creosote. It has both medical and industrial uses. [2] [4] Medicinally it is a topical medication applied to skin to treat psoriasis and seborrheic dermatitis . [5] It may be used in combination with ultraviolet light therapy. [5] Industrially it is a railroad tie preservative and used in the surfacing of roads. [6]