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Physical & Chemical properties

Dissociation constant

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Description of key information

Key value for chemical safety assessment

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Melamine has one measurable pKa value of 5.16 (Albert A. et al., 1948). Pyrophosphoric acid can dissociate by successive deprotonation resulting in four measurable pKa values, of 0.9, 2.31, 6.69 and 9.42 (O'Connor BJ et al, 2009).