(Scanned original: to be superseded.)

ESDU 84022 gives vapour pressure data for the first 7 normal alkanes and their isomers, 22 compounds in all. The data were obtained from a critical evaluation of experimental results in the literature, extrapolated by a reliable method into the low pressure region, and fitted by a Wagner equation applying over the full liquid range from the freezing to the critical point. The coefficients of the equation are given for each compound and three tables of vapour pressure are included: in SI units at 5 K intervals, in atmospheres at 5 degree C intervals and in lbf/sq in at 10 degree F intervals. The sources of the data used are listed, and a table gives likely uncertainties in values predicted by the equation that should be allowed for in any critical situation.