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n-Octane

      n-Octane is a chain-like hydrocarbon from the alkane group with the chemical formula C8H18. It is the unbranched representative and of the eighteen octane isomers.


      Physical Parameter

      Parameter

      Unit

       

      CAS Number

       

      111-65-9

      EC Number

       

      203-892-1

      Customs tariff number

       

      29011000

      Molar Mass

      g/mol

      114,23

      State at ambient temperature

       

      liquid, colourless

      Odour

       

      gasoline

      Density

      g/cm3 (15 °C)

      0,70

      Melting Point

      °C

      -57

      Boiling Point

      °C

      126

      Flash Point

      °C

      13

      Vapour Pressure

      kPa (20 °C)

      1,47

      Refractive Index

       

      1,3980


      n
      -Octane is almost insoluble in water, but shows very good solubility or unlimited miscibility with many organic solvents such as alcohols, ethers, esters, aromatics or chlorinated hydrocarbons.

       

      Applications

      Like all alkanes (paraffins, saturated hydrocarbons), n-octane is a very good solvent for nonpolar substances, fats and oils. Especially in the pharmaceutical industry, it is used as an inert solvent, for purification, recrystallization and washing of active pharmaceutical substances. 

      Heavy greases or oils can be diluted with paraffins such as n-octane to facilitate application. It is also found as a component in paints, varnishes and adhesives. 

      The technically most important octanes, n-octane and iso-octane, are used in special adhesives for plastics and elastomers (rubber) because they do not dissolve the plastic.

      To separate liquid chemical products, it can help to add paraffins such as n-octane to the mixture. So-called azeotropes (mixtures that cannot be separated by distillation) can be separated in this way in many cases. This process is used especially in the production of elastane fibers (Spandex, Lycra).

      • Solvents for non-polar substances
      • Purification of API (Active Pharmaceutical Ingredients)
      • Varnishes and paints
      • Adhesives, especially for plastics and elastomers
      • Thinners, cold cleaners
      • Process medium, separation of azeotropes


      Synonyms: Octane, Linear Octane

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      Topics: Pharmaceutical Industry, Paints, Coatings & Adhesives, Fine Chemistry, Polymer Industry, Octane (C8)