Refractive index database

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Optical constants of C5H5N (Pyridine)
Chang et al. 2024: n 0.4–2.0 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: false
wavelength_is_vacuum: false
temperature: 295


21.5–22.0 °C


H.-J. Chang, N. Munera, C. Lopez-Zelaya, D. Banerjee, G. Beadie, E. W. Van Stryland, D. J. Hagan. Refractive index measurements of liquids from 0.5 to 2 µm using Rayleigh interferometry, Opt. Mater. Express 14, 1253–1267 (2024)


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


Pyridine, C5H5N

Pyridine (C5H5N) is an organic compound featuring a heterocyclic ring structure containing one nitrogen atom. It appears as a colorless to pale yellow liquid with a distinctive, pungent odor often compared to fish. Pyridine is widely utilized as a solvent and reagent in organic synthesis, particularly in the manufacture of pesticides, pharmaceuticals, and vitamins. Additionally, its electrical conductivity and coordination properties make it valuable in electrochemistry and as a precursor in the synthesis of many agrochemicals and dyes. In terms of optics, pyridine's specific refractive index properties may be exploited in various applications. Due to its toxicity and unpleasant odor, careful handling and adequate ventilation are essential when working with pyridine.

Other names

  • Azabenzene
  • Azine
  • Azinine

External links