Refractive index database

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Optical constants of C4H8O2 (Dioxane)
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


1,4-Dioxane. 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]


Dioxane, C4H8O2

Dioxane (C4H8O2) is a clear, colorless organic solvent with a faint pleasant odor. It is used in a variety of industrial and scientific applications due to its miscibility with both water and many organic solvents. Dioxane is commonly used as a solvent for cellulose, resins, oils, and fats. In laboratories, it's often employed in organic synthesis and as a solvent in spectroscopic studies. It is also utilized in the preparation of certain pharmaceuticals. However, dioxane is classified as a potential human carcinogen and its use and disposal are subject to strict regulations in many countries. As such, many industries and laboratories are seeking safer alternatives.


  • 1,4-Dioxane (p-Dioxane) - most common isomer
  • 1,3-Dioxane (m-Dioxane)
  • 1,2-Dioxane (o-Dioxane)

Other names

  • p-Dioxane
  • Dioxane
  • 4-Dioxacyclohexane
  • [1,4]Dioxane
  • [6]-Crown-2

External links