Medicine<unk>  is used in medicated shampoo, soap and ointment. It demonstrates antifungal, anti-inflammatory, anti-itch, and antiparasitic properties. It may be applied topically as a treatment for dandruff and psoriasis, and to kill and repel head lice. It may be used in combination with ultraviolet light therapy.<unk>  may be used in two forms: crude<unk>  () or a<unk>  solution () also known as liquor carbonis detergens (LCD). Named brands include Denorex, Balnetar, Psoriasin, Tegrin, T/Gel, and Neutar. When used in the extemporaneous preparation of topical medications, it is supplied in the form of<unk>  topical solution USP, which consists of a 20% w/v solution of<unk>  in alcohol, with an additional 5% w/v of polysorbate 80 USP; this must then be diluted in an ointment base such as petrolatum. Construction<unk>  was a component of the first sealed roads. In its original development by Edgar Purnell Hooley,<unk> mac was<unk>  covered with granite chips. Later the filler used was industrial slag. Today, petroleum derived binders and sealers are more commonly used. These sealers are used to extend the life and reduce maintenance cost associated with asphalt pavements, primarily in asphalt road paving, car parks and walkways.<unk>  is incorporated into some parking-lot sealcoat products used to protect the structural integrity of the underlying pavement. Sealcoat products that are<unk>  based typically contain 20 to 35 percent<unk>  pitch. Research shows it is used throughout the United States of America, however several areas have banned its use in sealcoat products, including the District of Columbia; the city of Austin, Texas; Dane County, Wisconsin; the state of Washington; and several municipalities in Minnesota and others. Industry Being flammable,<unk>  is sometimes used for heating or to fire boilers. Like most heavy oils, it must be heated before it will flow easily. A large part of the binder used in the graphite industry for making "green blocks" is coke oven volatiles (COV), a considerable portion of which is<unk> . During the baking process of the green blocks as a part of commercial graphite production, most of the<unk>  binders are vaporised and are generally burned in an incinerator to prevent release into the atmosphere, as COV and<unk>  can be injurious to health.<unk>  is also used to manufacture paints, synthetic dyes (notably<unk> trazine/Yellow #5), and photographic materials. In the<unk>  gas era, there were many companies in Britain whose business was to distill<unk>  to separate the higher-value fractions, such as naphtha, creosote and pitch. Many industrial chemicals were first isolated from<unk>  during this time. These companies included: * Bonnington Chemical Works * British<unk>  Products * Lancashire<unk>  Distillers * Midland<unk>  Distillers * Newton, Chambers & Company (owners of Izal brand disinfectant) * Sadlers Chemicals
Coal tar
Asbestos
Khat
Polychlorinated naphthalene
Vinyl chloride
Dissolvable tobacco
Triphenylchloroethylene
Benzene