ISO 6121:1988
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Surface active agents -- Technical alkane sulfonates -- Determination of alkane monosulfonates content by direct two-phase titration

This standard has been reviewed* and then confirmed in 2013.

*ISO standards are reviewed every five years.


The determination is carried out in a consisting of an aqueous phase and a chloroform phase, in the presence of sodium sulfate, by titration against a standard volumetric cationic-active solution (benzethonium chloride), in the presence of an indicator consisting of a mixture of a cationic dye (dimidium bromide) and an anionic dye (acid blue 1).


  • Edition: 2 (Monolingual) ICS: 71.100.40
    Status: Published Stage: 90.93 (2013-04-22)
    TC/SC: ISO/TC 91 Number of Pages: 3
  • Revises: ISO 6121:1979

  • No corrigenda or amendments available

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