Chrysene is a
polycyclic aromatic hydrocarbon (PAH) with the molecular formula that consists of four fused
benzene rings. It is a natural constituent of
coal tar, from which it was first isolated and characterized. It is also found in
creosote at levels of 0.5–6 mg/kg.
[Anja Sörensen and Bodo Wichert "Asphalt and Bitumen" in Ullmann's Encyclopedia of Industrial Chemistry Wiley-VCH, Weinheim, 2009. http://www.qrpoil.com/site/?bitumen ]
The name "chrysene" originates from Greek ''Χρύσoς'' (''chrysos''), meaning "gold", and is due to the golden-yellow color of the crystals of the hydrocarbon, thought to be the proper color of the compound at the time of its isolation and characterization. However, high purity chrysene is colorless, the yellow hue being due to the traces of its yellow-orange isomer
tetracene
Tetracene, also called naphthacene, is a polycyclic aromatic hydrocarbon. It has the appearance of a pale orange powder. Tetracene is the four-ringed member of the series of acenes.
Tetracene is a molecular organic semiconductor, used in organic ...
, which cannot be separated easily.
Occurrence
Chrysene is a constituent of
tobacco smoke.
Safety
As with other PAHs, chrysene is suspected to be a human
carcinogen. Some evidence suggests that it causes cancer in laboratory animals, but chrysene is often contaminated with more strongly carcinogenic compounds. Chrysene is estimated to have about 1% of the toxicity of benzo(a)pyrene.
[Ian C.T. Nisbet, Peter K. LaGoy "Toxic equivalency factors (TEFs) for polycyclic aromatic hydrocarbons (PAHs)", Regulatory Toxicology and Pharmacology 1992, Volume 16, Pages 290-300. ]
Derivatives
Derivatives
The derivative of a function is the rate of change of the function's output relative to its input value.
Derivative may also refer to:
In mathematics and economics
*Brzozowski derivative in the theory of formal languages
*Formal derivative, an ...
of chrysene include
tetrahydrochrysene Tetrahydrochrysene (THC) may refer to:
* (''R'',''R'')-Tetrahydrochrysene ((''R'',''R'')-THC)
* (''S'',''S'')-Tetrahydrochrysene ((''S'',''S'')-THC)
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