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Physical & Chemical properties

Dissociation constant

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Description of key information

pKa= 1 at 25°C

Key value for chemical safety assessment

Additional information

The calculation was using recommended software program SPARC v4.6

The test compound consists of three components, two of which have 1, resp. 2 strongly acidic functional SO3- groups. The third component has no dissociable groups.

pKa= 0.68 (R= monochloro-monosulfo-)

pKa= 0.97 (R= disulfo-)

It can be concluded that the dissociation constant of test item was calculated to be pKa= 1 at 25°C