Refractive index database

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Optical constants of C2H3N (Acetonitrile)
Kozma et al. 2005: n 0.230–0.641 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]



22 °C


I. Z. Kozma, P. Krok, and E. Riedle. Direct measurement of the group-velocity mismatch and derivation of the refractive-index dispersion for a variety of solvents in the ultraviolet, J. Opt. Soc. Am. B 22, 1479-1485 (2005)


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


Acetonitrile, C2H3N

Acetonitrile (C2H3N): A colorless, volatile liquid, acetonitrile possesses a faintly sweet odor reminiscent of almonds. Widely used as a solvent, it has a high dielectric constant and is particularly effective in the dissolution of ionic compounds. In the laboratory, it is commonly employed as a polar aprotic solvent in organic synthesis and chromatographic processes, including high-performance liquid chromatography (HPLC). Acetonitrile is also utilized in the manufacture of pharmaceuticals, perfumes, and rubber products. Its low UV absorbance makes it valuable in UV-visible spectroscopy applications. The compound is miscible with water and most common organic solvents.

Chemical formula


Other names

  • Cyanomethane
  • Ethanenitrile
  • Ethyl nitrile
  • Methanecarbonitrile
  • Methyl cyanide

External links