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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

pKa = ca 10.7

Key value for chemical safety assessment

Additional information

Despite lack of information to assign validity of data, values found in literature are confirmed by QSAR calculation, indicating that hexamethylene diamine dissociation is not expected to occur within the environmentally relevant pH range (5-9). Therefore no further testing is deemed necessary.