Tetrachloroethylene (data page)

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This page provides supplementary chemical data on tetrachloroethylene.

The handling of this chemical may incur notable safety precautions. It is highly recommended that you seek the Material Safety Datasheet (MSDS) for this chemical from a reliable source such as SIRI, and follow its directions. MSDS is available from Fisher Scientific.

Structure and properties

Structure and properties
Index of refraction,[1] nD 1.5055 at 20 °C
Abbe number 38.67[2]
Dielectric constant,[3] εr 2.5 ε0 at 21 °C
Bond strength 78 kcal/mol (C–Cl)[4]
Bond length 1.354 Å (C=C), 1.718 Å (C–Cl)[5]
Bond angle 115.7° (Cl–C–Cl), 122.15° (C=C–Cl)[5]
Magnetic susceptibility −81.6×10−6 cm3/mol[6]
Surface tension[7] 31.74 dyn/cm at 20 °C(C2Cl4 against air)
44.4 dyn/cm at 25 °C (C2Cl4 against water)
Viscosity[8] 1.1384 mPa·sec at 0.43 °C
0.8759 mPa·sec at 22.3 °C
0.6539 mPa·sec at 52.68 °C
0.4034 mPa·sec at 117.09 °C

Thermodynamic properties

Phase behavior
Triple point 250.81 K (–22.34 °C), ? Pa
Critical point 620 K (347 °C), 4760 kPa
Std enthalpy change
of fusion, ΔfusHo		 10.88 kJ/mol
Std entropy change
of fusion, ΔfusSo		 43.38 J/(mol·K)
Std enthalpy change
of vaporization, ΔvapHo		 34.68 kJ/mol at 121 °C
Std entropy change
of vaporization, ΔvapSo		 102.8 J/(mol·K) at 25 °C
Solid properties
Std enthalpy change
of formation, ΔfHosolid		 ? kJ/mol
Standard molar entropy,
Sosolid		 ? J/(mol K)
Enthalpy of state transition, ΔtrsHo 0.820 kJ/mol (crystal II → crystal I)
–148 °C to –63 °C
Entropy of state transition, ΔtrsSo 5.26 J/(mol K) (crystal II → crystal I)
–148 °C to –63 °C
Heat capacity, cp ? J/(mol K)
Liquid properties
Std enthalpy change
of formation, ΔfHoliquid		 –54.4 kJ/mol Standard enthalpy of Formation (gas) -12.4 kJ/mol
Standard molar entropy,
Soliquid		 240.6 J/(mol K)
Enthalpy of combustion, ΔcHo –830 kJ/mol
Heat capacity, cp 146 J/(mol K) at 25 °C
Gas properties
Std enthalpy change
of formation, ΔfHogas		 –12.43 kJ/mol
Standard molar entropy,
Sogas		 343.4 J/(mol K) at 25 °C
Heat capacity, cp 95.51 J/(mol K) at 25 °C

Vapor pressure of liquid

P in mm Hg11040100400760
T in °C–20.6(s)13.840.161.3100.0120.8

Table data obtained from CRC Handbook of Chemistry and Physics 47th ed. Note that "(s)" annotation indicates equilibrium temperature of vapor pressure of solid. Otherwise indication is equilibrium temperature of vapor of liquid.

log10 of Tetrachloroethylene vapor pressure. Uses formula: obtained from CHERIC[9]

Distillation data

Spectral data

References

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