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)