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Physical & Chemical properties

Dissociation constant

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Description of key information

The determination of the dissociation constant of melam as described in the OECD guideline 112 via a titration, spectrophotometric or conductometric method failed due to the low solubility of melam.
The pKa-values for melam were therefore obtained by quantum mechanical calculations. Most likely pKa-values of 3.9; 4.8 and 8.2 for the 3 possible positions of the triazine-nitrogens were calculated.

Key value for chemical safety assessment

pKa at 20°C:
8.2

Additional information