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o-Xylene (ortho-xylene) is an aromatic hydrocarbon with the formula C 6 H 4 (CH 3) 2, with two methyl substituents bonded to adjacent carbon atoms of a benzene ring (the ortho configuration). It is a constitutional isomer of m -xylene and p -xylene, the mixture being called xylene or xylenes. o -Xylene is a colourless slightly oily flammable ...
The boiling point for each isomer is around 140 °C (284 °F). The density of each isomer is around 0.87 g/mL (7.3 lb/US gal; 8.7 lb/imp gal) and thus is less dense than water . The odor of xylene is detectable at concentrations as low as 0.08 to 3.7 ppm (parts of xylene per million parts of air) and can be tasted in water at 0.53 to 1.8 ppm.
This page contains tables of azeotrope data for various binary and ternary mixtures of solvents. The data include the composition of a mixture by weight (in binary azeotropes, when only one fraction is given, it is the fraction of the second component), the boiling point (b.p.) of a component, the boiling point of a mixture, and the specific gravity of the mixture.
Critical point: 631 K (358 °C), 3700 kPa Std enthalpy change of fusion, ... log 10 of o-Xylene vapor pressure. Uses formula: ...
Boiling point (°C) K b (°C⋅kg/mol) Freezing point (°C) K f (°C⋅kg/mol) Data source; Aniline: 184.3 3.69 ... Xylene: 140.0 [32] See also. Freezing-point ...
The p-xylene is then separated out in a series of distillation, adsorption or crystallization and reaction processes from the m-xylene, o-xylene, and ethylbenzene. Its melting point is the highest among this series of isomers, but simple crystallization does not allow easy purification due to the formation of eutectic mixtures. Such separation ...
Triple point: 286.3 K (13.15 °C), ? Pa Critical point: 617 K (344 °C), 3500 kPa Std enthalpy change of fusion, Δ fus H o: 17.1 kJ/mol Std entropy change of fusion, Δ fus S o: 59.8 J/(mol·K) Std enthalpy change of vaporization, Δ vap H o: 35.7 kJ/mol at 138 °C Std entropy change of vaporization, Δ vap S o? J/(mol·K) Solid properties Std ...
Critical point: 618 K (345 °C), ? Pa Std enthalpy change of fusion, Δ fus H o: 11.57 kJ/mol Std entropy change of fusion, Δ fus S o: 51.36 J/(mol·K) at –47.88 °C Std enthalpy change of vaporization, Δ vap H o: 35.66 kJ/mol at 139.2 °C Std entropy change of vaporization, Δ vap S o? J/(mol·K) Solid properties Std enthalpy change of ...