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isododecane

      Isododecane is a branched hydrocarbon from the group of the alkanes and has a chemical formula C12H26. However, it is actually a mixture of different isomers of dodecane, usually one molecule is the main isomer, 2,2,4,6,6-pentamethylheptane. This is also the technically most important one.


      Physical Parameter of 2,2,4,6,6-Pentamethylheptane

      Parameter

      Unit

       

      CAS Number

       

      13475-82-6

      EC Number

       

      236-757-0

      Molar Mass

      g/mol

      170.34

      State at ambient temperature

       

      liquid, colourless

      Odour

       

      virtually no odour

      Customs tariff number

       

      29011000

      Density

      g/cm3 (15 °C)

      0.74

      Melting Point

      °C

      -81

      Boiling Point

      °C

      175

      Flash Point

      °C

      45

      Viscosity

      hPa (20 °C)

      1.8

      Refractive Index

       

      1.4190


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

      The mixture of isododecane typically contains more than 80% 2,2,4,6,6-pentamethylheptane. This is for technical reasons. Because the molecule is so desirable, it is obtained from iso-butene by oligomerisation. This also produces other isomers. Complete separation is possible, but not necessary, because the mixture has very similar properties to 2,2,4,6,6-pentamethylheptane. 

       

      Application

      High-purity isododecane (min. 99.5% 2,2,4,6,6-pentamethylheptane) is used as a reference fuel for determining the cetane number of a diesel fuel; it is a so-called primary reference fuel.

      In the polymerization of olefins, isododecane is used as a suspending agent for the catalyst. 

      Isododecane is a substitute for siloxanes in cosmetics. It is hypoallergenic, odorless, spreads easily and leaves a nourished, silky feel on the skin. Isododecane is non-comedogenic.

      • Reference fuel for determining the cetane number (Primary Reference Fuel) 
      • Catalysts
      • Polymerization of olefins
      • Personal care, cosmetics, mascara, lipstick, creams, lotions, shampoo & hair care
      • Substitute for cyclosiloxanes
      • Emollient


      Synonyms: iso-Dodecane, 2,2,4,6,6-Pentametyhlheptane, branched Dodecane

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      Topics: Cosmetics and Personal Care, Fuel Industry, Catalyst Industry, Dodecane (C12), Nonane (C9, C10, C11, C12)