Density　and　viscosity　data　of　pure　liquid　4-fluoronitrobenzene　and　2-fluoronitrobenzene　were　determined　in　the　temperature　range　from　303.15　to　353.15　K　at　the　local　atmospheric　pressure　of　100.8　kPa.　Saturated　vapor　pressures　of　the　two　isomers　and　isobaric　vapor-liquid　equilibrium　(VLE)　data　for　the　binary　system　of　the　two　isomers　at　10.0　kPa　were　measured　experimentally　by　a　modified　Rose　still.　The　relationship　of　density　to　temperature　is　accurately　correlated　by　the　DIPPR　equation.　The　viscosity　data　were　well　described　by　the　Litovitz,　Ghatee,　VFT,　and　Andrade　equations.　Among　them,　Andrade　equation　shows　the　best　accuracy.　Both　Antoine　and　Riedel　equations　can　successfully　correlate　the　relationship　between　saturated　vapor　pressure　and　temperature,　while　Riedel　equation　is　more　accurate　due　to　the　small　average　relative　deviation.　The　binary　VLE　data　were　correlated　with　NRTL　and　Wilson　models,　and　the　binary　interaction　parameters　were　obtained.　The　VLE　data　predicted　by　the　obtained　parameters　are　in　good　agreement　with　the　experimental　data,　and　the　binary　system　did　not　exhibit　azeotropic　behavior.　The　thermodynamic　properties　of　the　pure　components　described　above　and　the　vapor-liquid　equilibrium　data　provided　are　critical　for　the　design　and　operation　of　the　distillation　of　the　isomeric　mixture　of　4-fluoronitrobenzene　+　2-fluoronitrobenzene.