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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Dissociation constant

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Description of key information

The substance does not dissociate protons based on its molecular structure. Hence an acetic dissociation constant cannot be provided. 

Key value for chemical safety assessment

pKa at 20°C:

Additional information

Based on its molecular structure, the substance does not dissociate protons. Hence an acetic dissociation constant cannot be provided. Hypothetical replacement of the sodium atom by a hydrogen atom, yielding CAS 80 -16 -0, indicates a week acid, with a acetic dissociation constant pKa of 1.88. Since however solution of the sodium salt in water yields pH values above 10 (c.f., Chapter 4.20), the acidity of the hypothetical CAS 80 -16 -0 will have no impact on the acid/basic behaviour of the substance.