Chrysene is a polycyclic aromatic hydrocarbon (PAH) with the molecular formula C 18H 12 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.
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, which cannot be separated easily.

Chemical Name	Chrysene
Synonyms	1,2,5,6-Dibenzonaphthalene;Benzo[a]phenanthrene;1,2-Benzophenanthrene;1,2-Benzphenanthrene;Chrysene;
CAS No.	218-01-9
Molecular Formula	C18H12
Molecular Weight	228.28800
PSA	0.00000
LogP	5.14620

MDL number	MFCD00003698
RTECS number	GC0700000
PubChem number	24861925
BRN number	1909297
EINECS number	205-923-4

Appearance & Physical State	COLOURLESS TO BEIGE CRYSTALS OR POWDER
Density	1.274
Boiling Point	448ºC
Melting Point	246-256ºC
Flash Point	209.1ºC
Refractive Index	1.771
Stability	Stable. Combustible. Incompatible with strong oxidizing agents.
Storage Condition	2-8ºC
Vapor Pressure	8.5E-08mmHg at 25°C

Safety Statements	S45-S53-S60-S61
HS Code	2902909090
Packing Group	III
RIDADR	UN 3077
Risk Statements	R45; R50/53; R68
Hazard Codes	T; N