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Physical & Chemical properties

Dissociation constant

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Description of key information

The calculated dissociation constants for the Mannich base component have been determined as 10.45+/-0.43, 9.14+/-0.10 and 8.09+/-0.20.

Key value for chemical safety assessment

pKa at 20°C:
10.45

Additional information

The dissociation constants in water was not determined using Method 112 of the OECD Guidelines for Testing of Chemicals, 12 May 1981 as the test item was a complex mixture with multiple dissociation constants over a narrow pH range and which would not be possible to measure accurately with the equipment available.

Calculated dissociation constants using ACD/Labs I-Lab 2.0 v12.1.0.50374 (ilab.acdlabs.com).