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Phenanthrene, also known as phenanthrin, is a polycyclic aromatic hydrocarbon (PAH) with three aromatic rings derived from coal tar. It has a chemical formula of C14H10, a molecular weight of 178.22, and exists as a colourless to white crystalline substance with a bluish fluorescence. It has a melting point of 100°C, a boiling point of 340°C, a density of 1.179 at 25°C. Phenanthrene is almost insoluble in water (1-1.6 mg/L), but is soluble in glacial acetic acid and a number of organic solvents including ethanol, benzene, carbon disulfide, carbon tetrachloride, diethyl ether, and toluene. [1,2]
