Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Dissociation constant

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Administrative data

Link to relevant study record(s)

Description of key information

A study on the dissociation constant does not need to be conducted. 

Key value for chemical safety assessment

Additional information

According to REACH Regulation (Annex IX, 7.16, column 2), the study on the dissociation constant is scientifically not justified as the surface active substance is a zwitterion (inner salt; amphoteric surfactant) that has both acid and alkaline properties at environmental relevant pH values and which dissociates in water rapidly with e.g. Na+ and Cl- acting as counterions.