This page provides supplementary chemical data on n-butane.
Material Safety Data Sheet
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 eChemPortal, and follow its directions.
Structure and properties
Structure and properties Index of refraction, nD 1.3326 at 20 °CCRC Handbook of Chemistry and Physics 85th ed, pp 202 Dielectric constant, εr 1.7697 ε0 at 23 °CCRC Handbook of Chemistry and Physics 85th ed, pp 1148 Symmetry group C2h Magnetic susceptibility ? Surface tension 12.46 dyn/cm at 20 °C P ≈ 225 kPa
Thermodynamic properties
Phase behavior Density (liquid) 0 °C 600 kg/m³ Density (saturated vapor) 1 atm, -0.5 °C 2.6 kg/m³ Triple point 134.6 K (–138.5 °C), 0.7 Pa Critical point 425.1 K (152.0 °C), 3796.0 kPa Std enthalpy changeof fusion, ΔfusHo 4.66 kJ/mol Std entropy changeof fusion, ΔfusSo 34.56 J/(mol·K) Std enthalpy changeof vaporization, ΔvapHo 22.44 kJ/mol Std entropy changeof vaporization, ΔvapSo 82.30 J/(mol·K) Solid properties Std enthalpy changeof formation, ΔfHosolid ? kJ/mol Standard molar entropy,Sosolid ? J/(mol K) Heat capacity, cp ? J/(mol K) Liquid properties Std enthalpy changeof formation, ΔfHoliquid -147.6 kJ/mol Standard molar entropy,Soliquid 229.7 J/(mol K) Heat capacity, cp 132.42 J/(mol K) –262 °C to –3 °C Gas properties Std enthalpy changeof formation, ΔfHogas –124.7 kJ/mol Standard molar entropy,Sogas 310.23 J/(mol K) Enthalpy of combustion, ΔcHo –2877.5 kJ/mol Heat capacity, cp 98.49 J/(mol K) at 25 °C n-butanevan der Waals' constantsLange's Handbook of Chemistry 10th ed, pp. 1522–1524 a = 1466.2 L2 kPa/mol2 b = 0.1226 liter per mole
Material Safety Data Sheet
The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet (MSDS) for this chemical from a reliable source such as eChemPortal, and follow its directions.
Structure and properties
Structure and properties Index of refraction, nD 1.3326 at 20 °CCRC Handbook of Chemistry and Physics 85th ed, pp 202 Dielectric constant, εr 1.7697 ε0 at 23 °CCRC Handbook of Chemistry and Physics 85th ed, pp 1148 Symmetry group C2h Magnetic susceptibility ? Surface tension 12.46 dyn/cm at 20 °C P ≈ 225 kPa
Thermodynamic properties
Phase behavior Density (liquid) 0 °C 600 kg/m³ Density (saturated vapor) 1 atm, -0.5 °C 2.6 kg/m³ Triple point 134.6 K (–138.5 °C), 0.7 Pa Critical point 425.1 K (152.0 °C), 3796.0 kPa Std enthalpy changeof fusion, ΔfusHo 4.66 kJ/mol Std entropy changeof fusion, ΔfusSo 34.56 J/(mol·K) Std enthalpy changeof vaporization, ΔvapHo 22.44 kJ/mol Std entropy changeof vaporization, ΔvapSo 82.30 J/(mol·K) Solid properties Std enthalpy changeof formation, ΔfHosolid ? kJ/mol Standard molar entropy,Sosolid ? J/(mol K) Heat capacity, cp ? J/(mol K) Liquid properties Std enthalpy changeof formation, ΔfHoliquid -147.6 kJ/mol Standard molar entropy,Soliquid 229.7 J/(mol K) Heat capacity, cp 132.42 J/(mol K) –262 °C to –3 °C Gas properties Std enthalpy changeof formation, ΔfHogas –124.7 kJ/mol Standard molar entropy,Sogas 310.23 J/(mol K) Enthalpy of combustion, ΔcHo –2877.5 kJ/mol Heat capacity, cp 98.49 J/(mol K) at 25 °C n-butanevan der Waals' constantsLange's Handbook of Chemistry 10th ed, pp. 1522–1524 a = 1466.2 L2 kPa/mol2 b = 0.1226 liter per mole
Vapor pressure of liquid P in mm Hg 1 10 40 100 400 760 1520 3800 7600 15200 30400 45600 T in °C –101.5 –77.8 –59.1 –44.2 –16.3 –0.5 18.8 50.0 79.5 116.0 — — n-Butane: Table data obtained from CRC Handbook of Chemistry and Physics 44th ed.
Spectral data
UV-Vis λmax ? nm Extinction coefficient, ε ? IR Major absorption bands ? cm−1 NMR Proton NMR Carbon-13 NMR Other NMR data MS Masses of main fragments
References