Refractive index database

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Optical constants of C2H5OH (Ethanol)
Myers et al. 2018: n,k 1.28–25.0 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants

Conditions & Spec sheet

n_is_absolute: true
wavelength_is_vacuum: true
temperature: 26 °C


26 °C


T. L. Myers, R. G. Tonkyn, T. O. Danby, M. S. Taubman, B. E. Bernacki, J. C. Birnbaum, S. W. Sharpe, T. J. Johnson. Accurate measurement of the optical constants n and k for a series of 57 inorganic and organic liquids for optical modeling and detection, Appl. Spectrosc. 72, 535-550 (2018) (see Supplemental Material for numerical data)


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Ethanol, C2H6O

Ethanol (C2H6O), often simply referred to as alcohol, is a clear, colorless liquid with a characteristic pleasant odor. It is best known as the active ingredient in alcoholic beverages but also has significant industrial and medicinal applications. As a solvent, it is widely used in the pharmaceutical and cosmetic industries. In the medical field, it serves as an antiseptic, disinfectant, and as an antidote in methanol and ethylene glycol poisoning. Ethanol is also used as a renewable fuel and fuel additive, typically referred to as bioethanol, which is produced through the fermentation of sugars by yeast.

Chemical formula


Other names

  • Ethyl alcohol
  • Grain alcohol
  • Pure alcohol
  • Hydroxyethane
  • Drinking alcohol
  • Ethyl hydrate

External links