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Coal tar is available as a generic medication and over the counter. [4] Side effects include skin irritation, sun sensitivity, allergic reactions, and skin discoloration. [5] It is unclear if use during pregnancy is safe for the baby and use during breastfeeding is not typically recommended. [11] The exact mechanism of action is unknown. [12]
Goeckerman regimens use crude coal tar, which contains polycyclic aromatic hydrocarbon, a carcinogen. [8] [9] However, Goeckerman therapy is considered safe although use of tar may have the side-effects of contact dermatitis and mild local burning due to tar hypersensitivity.
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 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.
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.
Generally mixed with coal gas, valued for being able to be produced "just in time" with 1 hour's notice, unlike coal gas, which would require 4+ days to bring online from idle. Low labor and capital costs, however, high, inefficient use of anthracite/coke feedstock. Carburetted water gas: Water gas and petroleum or coal tar.