Coal-tar pitch is a thick black liquid that remains after the distillation of coal tar.
It is used as a base for coatings and paint, in roofing and paving, and as a binder in asphalt products.
Both coal tar and coal-tar pitch contain many chemical compounds, including carcinogens such as benzene.
Coal tar, also known as liquor carbonis detergens (LCD), is a very thick, dark liquid with a number of medical and industrial uses.
As a medication it is used to treat psoriasis and seborrheic dermatitis (dandruff). … Coal tar is one of the by-products when coal is made into coke and coal gas.
It can be used in medicated shampoo, soap and ointment, as a treatment for dandruff and psoriasis, as well as being used to kill and repel head lice.
When used as a medication in the U.S., coal tar preparations are considered over-the-counter drug pharmaceuticals and are subject to regulation by the FDA.
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 coal tar topical solution USP, which consists of a 20% w/v solution of coal tar in alcohol, with an additional 5% w/v of polysorbate 80 USP; this must then be diluted in an ointment base such as petrolatum.