n-Propanol is widely used in different industries such as pharmaceutical manufacturing and agriculture. The thermophysical properties are the fundamentals for those processes. Viscosity is an important property which influences the design of process equipment

product quality monitoring and so on. However

the experimental data of viscosity are often obtained with discrete points. Correlating equations with these experimental data are prerequisite to use. To author's best knowledge

there is no such a viscosity correlation for n-propanol available in wide temperature and pressure ranges. The aim of this work is to develop the viscosity correlation of n-propanol with high accuracy

which can be used over the whole thermodynamic surface. Based on the selected reliable experimental data

the correlation for the viscosity of n-propanol was presented. The extrapolation behavior of the correlation is reasonable

and the temperature is valid from 150 to 400 K at pressures up to 120 MPa. The estimated uncertainties of this correlation are from 1% to 5%.