Coal Tar is a semisolid byproduct obtained in the destructive distillation of bituminous coal which functions in cosmetic products as a cosmetic biocide and denaturant — antidandruff agent is also listed as a function, but this is considered an over-the-counter (OTC) drug use. Coal Tar is a nearly black, viscous liquid, heavier than water, with a naphthalene-like odor and a sharp burning taste,...