Refractive index database

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Optical constants of C8H10 (Xylene)
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


p-Xylene. 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]


Xylene, C6H4(CH3)2

Xylene (C8H10) is a volatile organic compound consisting of a benzene ring with two methyl groups (-CH3) attached. It is typically found as a clear, colorless liquid possessing a sweet, aromatic odor reminiscent of gasoline. Xylene is primarily used as a solvent in the printing, rubber, and leather industries and is also a key ingredient in the production of polyethylene terephthalate (PET) plastics and polyester fibers. In optical applications, xylene's unique refractive properties may make it useful for specific purposes. However, xylene is known to be a potent neurotoxin and exposure can lead to significant health risks, necessitating stringent safety measures during use and handling.

Other names

  • Dimethylbenzene
  • Xylol

External links