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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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 pKa of isophorone diamine was calculated with the Solaris V4.67 software of Advanced Chemistry Development  (ACD) as 10.72. This is in reasonable agreement with a pKb of 3.6: pkA + pKb = 14.32 which is close to the theoretical value of 14.0.

Key value for chemical safety assessment

pKa at 20°C:

Additional information