High Quality Content by WIKIPEDIA articles! Phenanthrene is a polycyclic aromatic hydrocarbon composed of three fused benzene rings. The name phenanthrene is a composite of phenyl and anthracene. It provides the framework for the steroids. In its pure form, it is found in cigarette smoke and is a known irritant, photosensitising skin to light. Phenanthrene appears as a white powder having blue fluorescence.The compound with a phenanthrene skeleton and nitrogens at the 4 and 5 position is known as phenanthroline or 4,5-diazaphenanthrene (IUPAC name).Phenanthrene is insoluble in water but is soluble in most organic solvents such as toluene, carbon tetrachloride, ether, chloroform, acetic acid and benzene.

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