Wednesday, September 8, 2010

Sodium bis(2-ethylhexyl)sulfosuccinate, the anionic surfactant in COREXIT 9500



Sodium bis(2-ethylhexyl) sulfosuccinate (C20H37NaO7S), often referred to as docusate sodium, Aerosol OT or AOT, is an anionic surfactant and a common ingredient in consumer products, especially laxatives of the stool softener type. AOT is the most widely used surfactant in reverse micelle encapsulation studies It is also a component of the oil dispersant Corexit.

Bis(2-ethylhexyl) sulfosuccinate sodium salt(577-11-7)

  【RTECS Class】

  Reproductive Effector; Primary Irritant


    Odorless colorless to white waxy solid.

    【Odor threshold】



   Carbon monoxide, oxides of sulfur, carbon dioxide.

Sulfur dioxide (SO2) and sulfur trioxide (SO3)


    Synonyms: bis(2-ethylhexyl)sulfosuccinate sodium salt, bis(2-ethylhexyl)sodium sulfosuccinate, dioctyl sulfosuccinate sodium salt, dioctyl sodium succinate, a very wide range of further synonyms and trade names, including aerosol OT, cloace, doxol, doxinate, colace, molatoc, norval, obston, rapisol, docusate sodium, duosol, dulsivac, konlax, kosate Use: wetting, solubilising and dispersal agent Molecular formula: C20H37NaO7S CAS No: 577-11-7 EINECS No: 209-406-4

Physical data

    Appearance: white solid, often supplied as an aqueous solution Melting point: 173 - 179 C Boiling point: Vapour density: Vapour pressure: Density (g cm-3): Flash point: Explosion limits: Autoignition temperature: Water solubility: appreciable  


    Stable. Combustible. Incompatible with strong oxidizing agents.


    Harmful if swallowed. May be harmful if inhaled or absorbed through skin. Skin and respiratory irritant. Severe eye irritant. Toxicity data (The meaning of any toxicological abbreviations which appear in this section is given here.) ORL-RAT LD50 1900 mg kg-1 IPR-RAT LD50 590 mg kg-1 ORL-MUS LD50 2643 mg kg-1 IVN-MUS LD50 60 mg kg-1 Risk phrases (The meaning of any risk phrases which appear in this section is given here.) R22 R38 R41.

Transport information

    Non-hazardous for air, sea and road freight.

Personal protection


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Ethylhexyl Glycerin