A knowledge of the composition of asphalt on the basis of molecular size and chemical type, comparable to the analysis of the overhead cuts of petroleum, was desired. The method developed involved molecular distillation to yield a size separation; silica gel chromatography to separate saturates, aromatics, and resins; solvent dewaxing of the saturates to determine wax content; urea-complex formation to separate long-chain paraffins; alumina chromatography to separate monocyclic aromatics; peroxide oxidation followed by chromatography to

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NOTESVol. 65 oxide (0.15 g.) rapidly took up one cquivalent of hydrogen.The product boiled at 166-16.9" at 19 mm., and crystallized on cooling; m. p. 69-70".Anal. Calcd. for CISH180: C, 82.0; H, 9.5. Found: C, 82.0; H, 9.2. 4-Amino-2-cyclohexyl-5-methylphenol.-A cold suspension of cyclohexylcresol (5.7 9.) in aqueous sodium hydroxide was mixed with a solution prepared by diazotizing 6.3 g. of sulfanilic acid. Bfter it had stood for one hour, the mixture was treated with a solution of 14 g. of sodium hydrosulfite and then warmed until reduction was complete. The product was removed by filtration and crystallized from benzene. I t formed colorless nodules (4.8 g. 7851;) that became pink at 170" and melted to a browri liquid at 182".

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