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Dissociation constant

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Description of key information

not required

Key value for chemical safety assessment

Additional information

According to REACH Annex IX, 7.16, column 2 the test is scientifically not justified, as the surface active substance is a zwitterion that has no acid-base properties (at environmental relevant pH) which dissociates in water rapidly to a quaternary ammonium ion and the sulphate counter ion.