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Physical & Chemical properties

Dissociation constant

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Description of key information

The result given is related to 2 main representative selection components:

9-Octadecenoic acid: pKa= 4.7 at 25°C


pKa1= 6.7 and pKa2= 10 at 25°C

Key value for chemical safety assessment

Additional information

The substance is a multi-constituent (UVCB). Each component of a complex reaction mixture will theoretically have its own dissociation constant, therefore the test is irrelevant as a range of values will be obtained.

The macroscopic pKa values on the representative selection components of test item have been generated by calculation using recommended software program SPARC,v.4.6.