Fluoranthene is a polycyclic ambrosial hydrocarbon (PAH). The atom can be beheld as the admixture of naphthalene and benzene assemblage affiliated by a five-membered ring. Although samples are generally anemic yellow, the admixture is colorless. It is acrid in nonpolar amoebic solvents.It is a affiliate of the chic of PAHs accepted as non-alternant PAHs because it has rings added than those with six carbon atoms. It is a structural isomer of the alternant PAH pyrene. It is not as thermodynamically abiding as pyrene. Its name is acquired from itsfluorescence beneath UV light. It is acclimated in the amalgam of Florantyrone.