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Physical & Chemical properties

Dissociation constant

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Description of key information

The dissociation constant of the substance is 10,6 at 20°C.

Key value for chemical safety assessment

pKa at 20°C:
10.6

Additional information

SRC PhysProp which is a peer reviewed data base reported the dissociation constant of trimethylenediamine as result from an experimental study to be 10,6 at 20°C. REAXYS which is also a peer reviewed data base reports the dissociation constant to be 10.55 at 22 °C. In addition a QSAR estimation was done using SPARC v4.5 with the result of 10,62 and 8,64 at 20°C. All values are in the same range.

The value which originates from SRC PhysProp which is a peer reviewed data base is regarded to be reliable for trimethylenediamine