General Information and Properties

CAS No: 88-18-6

Ortho Tertiary Butyl Phenol / OTBP / 2-tert-butylphenol
Molecular Formula: C10H14O


    1AppearanceClear colourless to pale yellow Liquid
    2.Boiling Point224 C
    3.Density0.982 (20 C)


    1. Ortho Tertiary Butyl Phenol (OTBP) is used as an intermediate to make perfumery ingredients ortho tertiary butyl cyclohexyl acetate (OTBCHA) and 2-tert butyl cyclohexanol (OTBCH)
    2. Used as a raw material to make synthetic oil-based resins
    3. OTBP is used as a raw material in the agrochemical industry for some insecticides.



    Ortho Tertiary Butyl Phenol can be supplied in ISO Tankers or 150 kg galvanized drums


    An overview of OTBP

    Ortho-tertiary-butyl phenol aka 2 tert butylphenol is a chemical compound with a clear colourless and sometimes pale yellow appearance. It is a viscous liquid with a density of 0.982 at room temperature (approximately 20°C). It is often used as a basic raw material for antioxidants, fragrance compounds and various agrochemicals. Butyl phenol is used as an intermediate for flavours, fragrances, and antioxidant intermediates.


    Properties of OTBP:

    • CAS No: 88-18-6
    • Chemical Name: 2 tert butylphenol
    • Molecular Formula: C10H14O
    • Formula weight: 150.22
    • Melting point: −7 °C(lit.)
    • Boiling point: 224 °C(lit.)
    • Solubility: 0.97g/l soluble
    • Water Solubility: 0.23 g/100 mL (20 ºC)
    • Synonyms: OTBP; 2-tert.-Butylp; 2-t-Butylphenol; O-T-BUTYLPHENOL;Butylphenol, 97%; o-tert-butyl-pheno; O-TERT-BUTYLPHENOL;2-TERT-BUTYLPHENOL;o-reft-Butyl phenol;2-tert-Butyl phen01


    Manufacturing of ortho-tertiary-butyl phenol: An overview

    Phenol is reacted with isobutene in the presence of sulfonated polystyrene-poly divinylbenzene ion exchange resin to obtain ortho-tertiary-butyl phenol as the main alkylation product. The reaction of phenols with isobutylene at a particular molar ratio at 95°C results in a product mixture. OTBP compound has been tabletted with 10% graphite and preconditioned by exposing it to 650°C heat in an airstream. Based on phenol conversion, the selectivity for CAS 88-18-6 can be 88%.


    Uses and Applications

    Ortho-tertiary-butyl-phenol/2 tert butylphenol is widely used as an antioxidant. This compound was manufactured and evaluated as an intravenous anaesthetic agent. It has applications in a wide variety of industries including- consumer use, flame retardant, perfumery, fuel, lubricants, automotive care, manufacturing oils, plastics, coals and raw materials for various applications (eg: cosmetics, chemical manufacturing, production of chemicals, etc)

    OTBP/2 tert butylphenol compound is the starting material for the synthesis of various antioxidants as well as agrochemicals. Cis-2-t-butylcyclohexanol is obtained by the hydrogenation of ortho-tertiary-butyl phenol in the presence of catalysts and is used in the production of fragrance compounds. It is a chemical intermediate for polymerised resins, plasticizers, surface-active agents, perfumes among other products.

    Vinati Organics is one of the leading manufacturers and suppliers of ortho tertiary butyl phenol. OTBP from Vinati is obtained at a purity of 99% by distillation. The compound is formed with relatively high selectivity by a reaction between phenol and isobutene with gamma aluminium trioxide as a catalyst.

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