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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The dissociation constants of decamethylenediamine were determined according to OECD guideline no. 112 [adopted on 12 May 1981] with the titration method. A single dissociation constant of pKa = 10.7 (at 24.6 °C) was observed, indicating that the two amino groups have the same strength and have no measurable interaction.

Key value for chemical safety assessment

pKa at 20°C:

Additional information