Chrysene

Title: Chrysene
CAS Registry Number: 218-01-9
Additional Names: 1,2-Benzphenanthrene
Molecular Formula: C18H12
Molecular Weight: 228.29
Percent Composition: C 94.70%, H 5.30%
Literature References: Occurs in coal tar, q.v. Is formed during distillation of coal, in very small amount during distillation or pyrolysis of many fats and oils. Isoln from coal tar: Liebermann, Ann. 158, 299, 307 (1871). Purification by chromatography: Winterstein, Schön, Z. Physiol. Chem. 230, 146 (1934); Winterstein et al., ibid. 158. Synthesis by heating H2 and acetylene to 800°: Meyer, Ber. 45, 1633 (1912). From cholesterol on heating with palladium charcoal or activated charcoal: Schmid, Zentner, Monatsh. Chem. 49, 96 (1928). Review of toxicology and human exposure: Toxicological Profile for Polycyclic Aromatic Hydrocarbons (PB95-264370, 1995) 487 pp.
Properties: Orthorhombic bipyramidal plates from benzene. d420 1.274. mp 254°. Sublimes easily in vacuo. bp 448°. Strong fluorescence under ultraviolet light. Absorption spectrum: Marchlewski, Moroz, Bull. Soc. Chim. Fr. [4] 33, 1406 (1923). Slightly sol in alc, ether, carbon bisulfide, glacial acetic acid. At 25° one gram dissolves in 1300 ml abs alc, 480 ml toluene. About 5% is sol in toluene at 100°. Moderately sol in boiling benzene. Insol in water. Slightly sol in cold organic solvents, but fairly sol in these solvents when hot, including glacial acetic acid.
Melting point: mp 254°
Boiling point: bp 448°
Density: d420 1.274
Chrysergonic Acid Chrysin Chrysoidine Chrysophanic Acid Chymopapain

Chrysene[1]
Skeletal structure
Ball-and-stick model
Identifiers
CAS number 218-01-9 YesY
PubChem 10457109
ChemSpider 8817 YesY
UNII 084HCM49PT YesY
EC number 205-923-4
KEGG C14222 YesY
ChEBI CHEBI:51687 YesY
ChEMBL CHEMBL85685 N
RTECS number GC0700000
Jmol-3D images Image 1
Properties
Molecular formula C18H12
Molar mass 228.28
Appearance Orthorhombic bipyramidal plates
Density 1.274 g/cm3
Melting point 254 °C; 489 °F; 527 K
Boiling point 448 °C; 838 °F; 721 K
Solubility in water Insoluble
Solubility in Ethanol 1 mg/1300 mL
Related compounds
Related PAHs Pyrene, Tetracene, Triphenylene
 N (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Chrysene is a polycyclic aromatic hydrocarbon (PAH) with the molecular formula C
18
H
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, a chemical used to preserve wood.

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.

Chrysene is formed in small amounts during the burning or distillation of coal, crude oil, and plant material.

In February 2014, NASA announced a greatly upgraded database for tracking polycyclic aromatic hydrocarbons (PAHs), including Chrysene, in the universe. According to scientists, more than 20% of the carbon in the universe may be associated with PAHs, possible starting materials for the formation of life. PAHs seem to have been formed shortly after the Big Bang, are widespread throughout the universe, and are associated with new stars and exoplanets.[2]