Coal Tar 2 : A black, viscous liquid (or semisolid) with a napthaline-like odor, obtained by the destructive distillation of bituminous coal, and which is combustible and toxic if inhaled
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}