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Physical & Chemical properties

Dissociation constant

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Description of key information

Undecylenic acid has dissociating properties.

Key value for chemical safety assessment

pKa at 20°C:
4.85

Additional information

Undecylenic acid has dissociating properties. However due to its low solubility in water, the acidity constant could not be determined for temperatures lower than 60°C. At 60°C the acidity constant of undecylenic acid is 4.85 (with ionic strentgh : 0.01 mol/L).