Pentane (data page)

This page provides supplementary chemical data on n-pentane.

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.

Mallinckrodt Baker.

Structure and properties

Structure and properties
Index of refraction, n_D	1.3575 at 20 °C
Abbe number	?
Dielectric constant, ε_r	1.844 ε₀ at 20 °C
Bond strength	?
Bond length	?
Bond angle	?
Magnetic susceptibility	?
Surface tension	18.16 dyn/cm at 0 °C 17.03 dyn/cm at 10 °C 15.82 dyn/cm at 20 °C 14.73 dyn/cm at 30 °C 13.66 dyn/cm at 40 °C
Viscosity	0.2894 mPa·s at 0 °C 0.2395 mPa·s at 20 °C 0.2200 mPa·s at 30 °C

Thermodynamic properties

Phase behavior
Triple point	143.46 K (–128.69 °C), 0.076 Pa
Critical point	469.8 K (196.7 °C), 3360 kPa
Std enthalpy change of fusion, Δ_fusH^o	8.4 kJ/mol
Std entropy change of fusion, Δ_fusS^o	58.5 J/(mol·K)
Std enthalpy change of vaporization, Δ_vapH^o	26.200 kJ/mol at 25 °C 25.79 kJ/mol at 36.1 °C
Std entropy change of vaporization, Δ_vapS^o	87.88 J/(mol·K) at 25 °C
Solid properties
Std enthalpy change of formation, Δ_fH^o_solid	? kJ/mol
Standard molar entropy, S^o_solid	? J/(mol K)
Heat capacity, c_p	? J/(mol K)
Liquid properties
Std enthalpy change of formation, Δ_fH^o_liquid	–173.5 kJ/mol
Standard molar entropy, S^o_liquid	263.47 J/(mol K)
Enthalpy of combustion, Δ_cH^o_liquid	–3509 kJ/mol
Heat capacity, c_p	167.19 J/(mol K) at 25 °C
Gas properties
Std enthalpy change of formation, Δ_fH^o_gas	–146.8 kJ/mol
Standard molar entropy, S^o_gas	347.82 J/(mol K)
Enthalpy of combustion, Δ_cH^o_gas	–3535 kJ/mol
Heat capacity, c_p	120.07 J/(mol K) at 25 °C

Vapor pressure of liquid

P in mm Hg		1	10	40	100	400	760	1520	3800	7600	15200	30400	45600
T in °C		–76.6	–50.1	–29.2	–12.6	18.5	36.1	58.0	92.4	124.7	164.3	—	—

Table data obtained from CRC Handbook of Chemistry and Physics 47th ed.

**log₁₀ of n-Pentane vapor pressure.** Uses formula: $\scriptstyle \log _{e}P_{mmHg}=$ $\scriptstyle \log _{e}({\frac {760}{101.325}})-10.41840\log _{e}(T+273.15)-{\frac {5778.024}{T+273.15}}+81.92460+1.178208\times 10^{-5}(T+273.15)^{2}$ obtained from CHERIC

Spectral data

UV-Vis
λ_max	? nm
Extinction coefficient, ε	?
IR
Major absorption bands	2881, 2940, 2965 cm⁻¹
NMR
Proton NMR
Carbon-13 NMR
Other NMR data
MS
Masses of main fragments

This box:

Except where noted otherwise, data relate to Standard temperature and pressure.
Reliability of data general note.

References

Linstrom, Peter (1997). "NIST Standard Reference Database". National Institute of Standards and Technology. doi:10.18434/T4D303. {{cite journal}}: Cite journal requires |journal= (help)