Refractive index database

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Optical constants of C2Cl4 (Tetrachloroethylene, PCE, PERC)
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]


Tetrachloroethylene, C2Cl4

Tetrachloroethylene (C2Cl4), also known as perchloroethylene, is a halogenated alkene widely used as a dry cleaning solvent and metal degreasing agent. It is a dense, non-flammable liquid with a sweet, ether-like odor. Due to its ability to dissolve a wide range of organic materials, it is highly valued in the textile and chemical industries. Although not prominently used for its optical properties, tetrachloroethylene's high refractive index can be utilized in specialized optical applications such as non-aqueous refractometry and other scientific measurements where its solvent properties are advantageous.

Other names

  • Perchloroethylene
  • Perc
  • Tetrachlorethene
  • Perclene
  • Carbon dichloride
  • Perchlor
  • Perchloroethene

External links