Coal tar
Coal tar
Coal tar (pronunciation: /koʊl tɑːr/) is a thick, dark liquid which is a by-product of the process of coal gasification and coal carbonization. It is historically known for its use in medical treatments and as a sealant for roads and rooftops.
Etymology
The term "coal tar" comes from its origin as a by-product in the coal industry. "Coal" is derived from the Old English term "col," meaning charcoal, while "tar" is derived from the Old English "teoru," meaning resin or pitch.
Medical Uses
Coal tar has been used in medicine for its antiseptic, anti-inflammatory, and antipruritic properties. It is commonly used in the treatment of psoriasis, dandruff, and eczema. It works by slowing the growth of skin cells and reducing inflammation and itching.
Related Terms
- Coal gasification: The process of producing syngas from coal and water, air, and/or oxygen.
- Coal carbonization: The process of converting coal into coke by heating it in the absence of air.
- Psoriasis: A chronic skin condition that causes cells to build up rapidly on the surface of the skin.
- Dandruff: A common condition that causes the skin on the scalp to flake.
- Eczema: A condition that makes your skin red and itchy.
See Also
External links
- Medical encyclopedia article on Coal tar
- Wikipedia's article - Coal tar
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