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    Petrochemical Intermediates

    Linear Alkylbenzene (LAB)

    About This Product

    Linear alkylbenzene is an aromatic hydrocarbon in which a benzene ring carries a straight C10–C13 alkyl chain. It is a clear, bright liquid of colour 10 Hazen max, density 0.855–0.870 g/ml and refractive index 1.481–1.485 at 20 °C, with bromine index 10 mg Br/100 g max and moisture 0.02% max. By gas chromatography the C12 fraction is 20–55% and the C11 fraction 10–45%, while C14 is held to 3.0% max.

    LAB is mainly sulphonated into linear alkylbenzene sulphonic acid and then neutralised to the sulphonate that serves as the core active in synthetic laundry powders and liquid detergents; a sulphonatability of 98.6% min shows how fully it converts. Smaller outlets include additives for cable, transformer and capacitor oils, modified emulsifiers and lubricants, and some solvent uses.

    Agree the 2-phenyl isomer level and carbon distribution the sulphonation plant needs, since both affect the solubility and performance of the finished sulphonate. The distillation points (280 °C at 5%, 315 °C at 95%) are given as single temperatures without stated limits, so confirm how they apply. Obtain the SDS and a lot analysis certificate before the first delivery.

    Specifications

    CAS No.67774-74-7
    Alkyl groupC10–C13, linear
    Appearance and colourClear and bright; 10 Hazen max
    Density at 20 °C0.855–0.870 g/ml
    Refractive index at 20 °C1.481–1.485
    Bromine index10 mg Br/100 g max
    Average molecular weight238–244
    Sulphonatability98.6% min
    Distillation5% at 280 °C; 95% at 315 °C
    Moisture0.02% max
    Carbon distribution (wt%, gas chromatography)Below C10 1.0% max; C10 5–16%; C11 10–45%; C12 20–55%; C13 5–30%; C14 3.0% max; above C14 0.5% max
    2-Phenyl isomer20% max

    Applications

    Feedstock for linear alkylbenzene sulphonic acid (LABSA)Synthetic laundry and liquid detergent activesCable, transformer and capacitor oil additivesModified emulsifiers and lubricantsSolvent uses