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chrysene

chrysene Chem.
  (ˈkraɪsiːn)
  Also chrysen.
  [ad. F. chrysène (A. Laurent 1837, in Ann. de Chimie LXVI. 137), f. chrys- + -ene.]
  A solid hydrocarbon, C18H12, occurring in crystalline form in the highest boiling fractions of coal tar, and in other substances, variable in colour and exhibiting violet fluorescence.

1864 Chem. News X. 244/1 Laurent's pyren, I am inclined to think, was merely chrysen containing an admixture of paraffin. Ibid. 244/2 Chrysen compounds. 1871 Jrnl. Chem. Soc. XXIV. 692 The chrysene employed in this research was extracted from the mixture of solid hydro-carbons which have a higher boiling point than anthracene, and form the latter portion of the distillate from coal tar. 1943 Endeavour Jan. 30/1 The..compound presents a rough resemblance to..chrysene. 1957 Encycl. Brit. V. 665/1 Chrysene, C18H12, crystallizes in colourless plates or octahedra (from benzene), which exhibit a violet fluorescence.

Oxford English Dictionary

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