SATURATED VAPOR-PRESSURE MEASUREMENTS ON ISOMERIC MONONITROTOLUENES AT TEMPERATURES BETWEEN 380-K AND 460-K

The saturated vapor pressure data of 2-nitrotoluene, 3-nitrotoluene, a nd 4-nitrotoluene have been measured by comparative ebulliometry over the approximate range 380-460 K with estimated accuracy better than +/ -0.01 K in the temperature and better than +/-0.05 % of the measured p ressure value. The results obtained were represented by the Antoine eq uation. No accurate vapor pressures for 2-nitrotoluene and 3-nitrotolu ene have been found in the open literature. For 4-nitrotoluene, the pr esent data supplement the vapor pressures reported by Ambrose and Gund ry (1980), both sets being in good mutual agreement. The joint vapor p ressure data for 4-nitrotoluene were fitted by the Wagner equation, co vering the entire range of conditions of the liquid-phase existence.