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Coal tar - Dixie Southern

Coal tar

A brown or black liquid of extremely high viscosity that smells of naphthalene and aromatic hydrocarbons. Is among the by-products when coal is carbonized to make coke or gasified to make coal gas. Coal tars are complex and variable mixtures of phenols, polycyclic aromatic hydrocarbons (PAHs) and heterocyclic compounds, about 200 substances in all.