Fluoranthene

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Fluoranthene

IUPAC name	Fluoranthene
Other names	Benzo(j, k)fluorene
Identifiers
CAS number	[206-44-0]
SMILES	c12c3cccc1cccc2c1c3cccc1
Properties
Molecular formula	C₁₆H₁₀
Molar mass	202.26 g/mol
Appearance	Yellow to green needles
Density	1.252 g/cm³ (0 °C), solid
Melting point	110.8 °C (384.0 K)
Boiling point	375 °C (648 K)
Solubility in water	265 μg/l (25 °C)
Viscosity	0.652 cP at 20 °C
Structure
Molecular shape	Planar
Dipole moment	0 D
Hazards
Flash point	210 °C (483 K)
Autoignition temperature	? °C (? K)
Related compounds
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Fluoranthene is a polycyclic aromatic hydrocarbon (PAH) consisting of a naphthalene and a benzene unit connected by a five-membered ring. It is a member of the class of PAHs known as non-alternant PAHs because it has rings other than those with six carbon atoms. It is a structural isomer of the alternant PAH pyrene. It is not as thermodynamically stable as pyrene because its electrons cannot resonate throughout the complete structure as the corresponding ones in pyrene.

Fluoranthene is found in many combustion products, along with other PAHs. Its presence is an indicator of less efficient or lower-temperature combustion, since non-alternant PAHs are less preferred in formation than alternant PAHs. Fluoranthene is one of the U.S. Environmental Protection Agency's 16 priority pollutant PAHs and is a carcinogen.

Fluoranthene has been isolated from coal tar pitch. Its name derives fluorescence under UV light.

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