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

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