coal tar 
noun [mass noun]
A thick black liquid produced by distilling bituminous coal, containing benzene, naphthalene, phenols, aniline, and many other organic chemicals.Derived chiefly from petroleum and coal tar, aromatic hydrocarbons tend to be reactive....
- This form of creosote, a mixture of chemicals created by distilling coal tar, is toxic in large amounts or after extended exposure.
- Common aromatic compounds other than benzene include toluene, naphthalene, and anthracene, all of which are present in coal tar or creosote.