Hello,

Coal tar is a thick black liquid which is a by-product of the production of coal gas and coke. It contains benzene, naphthalene, phenols, aniline, and many other organic chemicals. Coal tar is used for medical and industrial purposes. However, coal is also known as cutar, balnetar, liquor carbonis detergens, liquor picis carbonis, etc.

At normal temperature, the Coal Tar is semisolid in form and hence complicated to use. So, every time before being used, the coal tar is heated to convert it into liquid state and easier to apply.

Best Wishes.