Refractive index database

nk database   |   n2 database   |   about




Optical constants of C12H24O12 (Lactose monohydrate)
Juntunen et al. 2024: n 1.10–1.65 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]


Conditions & Spec sheet

temperature: 23 °C


Powder. 23 °C


C. Juntunen, A. J. Rish, C. A. Anderson, Y. Sung. Refractive index measurement of pharmaceutical powders in the short-wave infrared range using index matching assisted with phase imaging, Powder Technol. 438, 119621-23149 (2024)


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


Lactose monohydrate, C12H24O12

Lactose monohydrate is a carbohydrate and a derivative of lactose, where one molecule of lactose is chemically bound to a molecule of water. This compound is extensively utilized in the pharmaceutical and food industries as an excipient and a stabilizer for the formulation of tablets and capsules, as well as a filler in the manufacture of foods.

Other names

  • Lactose hydrate
  • Milk sugar monohydrate
  • 4-O-β-D-Galactopyranosyl-D-glucose monohydrate
  • D-Lactose monohydrate
  • Pharmatose
  • CAS Number: 64044-51-5
  • EINECS: 200-559-2

External links