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Dissociation constant

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Description of key information

List of species and pKa value regarded at 20 °C:
pka = 13.23 for C16 FA component
pKa = 12.42 for C18 FA component

Key value for chemical safety assessment

Additional information

The dissociation constant of the substance sorbitan stearate (CAS 1338-41-6) was determined by QSAR calculation with SPARC (v4.5). Both components (C16 and C18 FA component) have

three dissociable hydroxyl group, but there is no dissociation in the environmental relevant pH range between 5 and 9.