Refractive index database

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Optical constants of C5H12 (Pentane)
Kerl and Varchmin 1995: n-Pentane; 293 K; n 0.326–0.644 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]



n-Pentane; 293 K (20 °C). See the original publication for the expression for n(λ,T).


K. Kerl, H. Varchmin. Refractive index dispersion (RID) of some liquids in the UV/VIS between 20°C and 60°C, J. Mol. Struct. 349, 257-260 (1995)


[Expressions for n]   [CSV - comma separated]   [TXT - tab separated]   [Full database record]


Pentane, C5H12

Pentane (C5H12) is a straight-chain alkane with five carbon atoms. It is a volatile and flammable liquid at room temperature and is found in the gasoline fraction during the refining of crude oil. Being highly flammable, it's used as a component in some fuel mixtures and as a solvent in laboratories. Additionally, pentane is utilized in the production of foam and polystyrene, serving as a blowing agent that helps form bubbles within the material. When considering its optical properties, it's relatively transparent in the visible range. Proper precautions should be taken when working with pentane due to its highly flammable nature and potential to form explosive mixtures in air.

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