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Physical & Chemical properties

Dissociation constant

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Description of key information

Dissociation constant (K) at 25 °C: 0.1006; pKa: -0.9974

Key value for chemical safety assessment

pKa at 20°C:
-0.997

Additional information

In two peer reviewed sources the dissociation constant was reported being 0.1006 and 0.101 at 25 °C. Thus, as pKa the value of -0.9974 is taken forward, confirming sulphamidic acid being a strong acid.