Nujol

8042-47-5

Nujol is a colorless oily liquid. As a representative of paraffin oils, it is a mixture of long-chain alkanes.

An important application is as a suspending agent in Nujol, the infrared spectroscopy. Due to its following characteristics, it is well suited for this:

  • As heavy paraffin oil Nujol is chemically inert under normal conditions against many substances. To reactive substances, it also forms a protective layer and prevents decomposition during the measurement process.
  • Nujol has a relatively simple absorption spectrum in the infrared. His bands lie between 2950-2750 ( s ), 1465-1450 (m), 1380-1370 (m) and 620 (w ) cm -1 ( wavenumbers), which are caused by CH2 and CH3 vibrations. The bands usually do not overlap the characteristic bands of the test substance.
  • Transparent, homogeneous emulsions of Nujol and solids can be prepared by trituration of the substance in Nujol. For the production of Nujol mulls supersaturation of the IR spectrum can be avoided by nujol, since the spectrum of the substance can be reproduced distorted. Supersaturation occurs ( > 100:1), especially at high Nujol shares.

The refractive index of Nujol is: .

Sample preparation

610756
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