Refractive index database

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Optical constants of C4H8O (Tetrahydrofuran, THF)
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]


Tetrahydrofuran (THF), C4H8O

Tetrahydrofuran (C4H8O), commonly referred to as THF, is a cyclic ether that appears as a clear, colorless liquid with an ether-like odor. It is highly volatile, water-miscible, and has a low viscosity, which makes it an excellent solvent for a wide variety of organic substances, including resins, polymers, and some metals. THF is particularly crucial in the production of polyvinyl chloride (PVC) piping and adhesives due to its ability to dissolve PVC without reacting with it. It is also widely used as a precursor to polymers and as a reaction medium in organic synthesis. Due to its rapid evaporation rate and excellent solvency, THF is often employed in specialized applications in both laboratory and industrial settings. However, it poses significant health risks if inhaled, ingested, or contacted with skin, necessitating careful handling.

Other names

  • Oxolane
  • Butylene oxide
  • Cyclotetramethylene oxide
  • Diethylene oxide
  • Furanidin
  • Tetramethylene oxide

External links