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Dissociation constant

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Description of key information

Data waiver in accordance with section 1 of REACH Annex XI

Key value for chemical safety assessment

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In accordance with section 1 of REACH Annex XI, the dissociation constant study does not need to be performed as the substance is a salt. Salts are reaction products of acids and bases that retain their ionic character. Finally, conducting a study would result in the pKa value of the corresponding acid of 'Benzenesulfonic acid, di-C10-14-alkyl derivs., calcium salts'.

For aromatic sulfonic acids such as benzosulfonic acid the pKa value is <1(source: Hodgman, C.D. 1961. Handbook of Chemistry and Physics, 43rd edition. The Chemical Rubber Publishing Company, Cleveland, Ohio).