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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Link to relevant study record(s)

Description of key information

The dissociation constant Pka ranges from 4.9 – 5.7 at 20/25 °C.

Key value for chemical safety assessment

Additional information

There is no experimental data for the dissociation constant available.

The value of the dissociation constant pKa is estimated by using a category approach based on the available data for the main constituents of the substance (components present up to 10 % or more).