The physical properties and chemical composition of a PR Springs, Utah, tar sand bitumen are presented. These physical properties are compared with those of other bitumens. The bitumen is separated into five major fractions--acids, bases, neutral nitrogen compounds, saturated hydrocarbons, and aromatic hydrocarbons. This is accomplished by ion exchange, coordination complex, and adsorption chromatography. Further concentration of compound types from these fractions is achieved by gel permeation, liquid adsorption, and thin layer chromatography. Techniques for the analysis of compound types in the concentrates include fluorescence, infrared, and mass spectroscopy. Compound types identified in the acids include carboxylic acids, phenols, amides, and carbazoles. Compound types identified in the bases include amides and pyridines. The neutral nitrogen compounds consist predominantly of carbazoles and amides. Saturated and aromatic hydrocarbons were 85 percent distillable (less than 538/sup 0/C) and were examined by GLC and fluorescence and mass spectroscopy.