Refractive index database

nk database   |   n2 database   |   about




Optical constants of C5H12O2 (Pentanediol)
Moutzouris et al. 2013: n 0.450–1.55 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula



1,5-Pentanediol; 300 K (27 °C).


K. Moutzouris, M. Papamichael, S. C. Betsis, I. Stavrakas, G. Hloupis and D. Triantis. Refractive, dispersive and thermo-optic properties of twelve organic solvents in the visible and near-infrared, Appl. Phys. B 116, 617-622 (2013)


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


Pentanediol, C5H12O2

Pentanediol (C5H12O2) is an organic compound primarily used in the industrial production of polymers and as a solvent in various chemical reactions. It belongs to the family of diols, which are alcohols with two hydroxyl (-OH) groups. Pentanediol can exist in multiple isomeric forms depending on the position of the hydroxyl groups in the molecule. In the realm of optics, it's relatively transparent in the visible range. Like other organic solvents, it's important to handle pentanediol with care, considering its potential reactivity and health effects. Safe storage and handling measures should be adhered to, especially when used in significant quantities.


  • 1,5-Pentanediol - most common isomer
  • 2,4-Pentanediol
  • 1,2-Pentanediol

Chemical formula

1,5-Pentanediol: HOCH2CH2CH2CH2CH2OH

Other names

  • Pentane-1,5-diol
  • Pentylene glycol
  • Pentamethylene glycol
  • 1,5-Dihydroxypentane

External links