Question

Wht is Coal tar?
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Answer 1

Answer:

Coal tar is a thick dark liquid which is a by-product of the production of coke and coal gas from coal. It has both medical and industrial uses...

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Answer 2

Answer:

Coal tar is a thick dark liquid which is a by-product of the production of coke and coal gas from coal. It has both medical and industrial uses. Medicinally it is a topical medication applied to skin to treat psoriasis and seborrheic dermatitis. It may be used in combination with ultraviolet light therapy.