Isobutylene (CAS 115-11-7) is a colourless gas that has a mild petroleum-like odour. Its molecular formula is C4H8 with a molar mass of 56.11. Also called 2-methylprop-1-ene or Isobutene, it is a flammable gas, very soluble in ethanol and ether. Isobutylene is a four-carbon branched alkene, one of the four isomers of butylene. Vinati Organics is one of the largest isobutylene manufacturers and we provide the highest purity of this speciality chemical.


    Physical and Chemical Properties:

    IUPAC Name:2-methylprop-1-ene
    Molecular Formula:C4H8
    CAS Number: 115-11-7
    Molar Weight:56.11
    Melting Point:−140.3 °C
    Boiling Point:−6.9 °C
    Density:0.5879 g/cm3, liquid
    Vapor Density:1.94 (Air=1)

    Solubility: Insoluble in water, very soluble in ethanol and ether and soluble in benzene

    Synonyms: 2-Methylpropene, Isobutene, γ-Butylene, 2-Methylpropylene, Methylpropene


    How is it manufactured?

    Isobutylene aka 2 methylpropene or Isobutene is generally produced by dehydrating tertiary butyl alcohol (TBA) or catalytic dehydrogenation of isobutane. The gasoline additives methyl tertiary butyl ether (MTBE) and ethyl tertiary butyl ether (ETBE) are synthesised by reacting methanol or ethanol with isobutylene contained in butene streams from olefin stream refineries or with isobutylene from dehydrated TBA.

    Another method of manufacturing isobutylene/isobutene is by back-cracking MTBE or ETBE at high temperatures and then separating the isobutylene by distillation from methanol (methyl alcohol) or ethanol.


    Industry Applications

    • Isobutylene/2 methylpropene is widely used for the production of various compounds. It is used to produce isooctane, a high octane aviation gasoline.
    • It is also used to synthesise butyl rubber, trimers and other polymers.
    • Isobutylene is a key component for the production of antioxidants such as butylated hydroxytoluene (BHT), 4-methoxyphenol and therefore useful in foods, supplements, packaging and plastics.
    • It also has wide applications in perfume, fragrance and lubricant domains.



    Vinati Organics Pvt. Ltd. is one of the biggest isobutylene/2 methylpropene/isobutene manufacturers. With 2 state-of-the-art manufacturing facilities in India, we ensure the highest quality and purity of isobutylene for our clients. We follow the international standards to manufacture our speciality chemicals and organic intermediates. With constant innovation, we supply isobutylene to 35+ countries across the US, Europe and Asia. Vinati Organics employs green manufacturing practices to create environment-friendly products and we strive to keep the impact on climate minimum.

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