Experimental Measurement of Viscosity of N-Octane at Elevated Pressure and Temperature

We have measured the viscosity of normal octane at temperature 30? C, 50? C, 75? C, and 100?Catpressure up to 5.5 kbar by using the rolling-ball viscometer. The estimated accuracy in the viscosity data is + 1 percent. The experimental data obtained have been compared with values reported by other authors in the literature and found to be in good agreement. The results for pressure variation are represented by an empirical relation. We have also checked upto4 kbar the validity of some observations made by Kiran and Senregarding the relationship between viscosity and density of n-octane.