Coal Tar

http://www.safecosmetics.org/get-the-facts/chemicals-of-concern/coal-tar/

Coal tar is a known carcinogen derived from burning coal. It is a complex mixture of hundreds of compounds, many of which are polycyclic aromatic hydrocarbons (PAHs) [1,2]. Coal tar is used in food, textiles, cosmetics and personal care products. Experimental studies have found that application of and exposure to coal tar produce skin tumors and neurological damage.