Refractive index database

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Optical constants of C2H6 (Ethane)
Loria 1909: Gas at 0 °C; n 0.523–0.668 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]


Conditions & Spec sheet

n_is_absolute: true
temperature: 0 °C
pressure: 101325 Pa


Standard conditions. 0 °C, 760 torr (101.325 kPa).


S. Loria Über die Dispersion des Lichtes in gasförmigen Kohlenwasserstoffen. Annalen der Physik 334, 605-622 (1909) (in German).
* Cauchy formula and experimental data presented in the paper don't match. Original data are re-fitted and the new formula is included in the database. See [Figure] for the comparison of the original data, the original fit and the new fit.


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


Ethane, C2H6

Ethane (C2H6) is a colorless, odorless, and flammable hydrocarbon gas that belongs to the alkane series. It is the second-largest component of natural gas and is often used as a fuel. In the petrochemical industry, ethane is primarily utilized as a feedstock for the production of ethylene, a key building block for various plastics and other chemicals. When subjected to extremely low temperatures or high pressures, ethane can be liquified, making it easier to transport and store. As a molecule, ethane is notable for its single bond between the two carbon atoms, representing a typical sigma bond in organic chemistry.

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