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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

OECD Guidelines for testing of chemicals, Guideline no. 112

Due to the low solubility of the test material the pKa-value could not be determined experimentally. NA-11 has one acidic and no basic group. The pKa value for the acidic group is calculated to be 2,1.

Key value for chemical safety assessment

pKa at 20°C:

Additional information

Due to the calculated pKa-value of 2,1 dissociation of the organic Na-salt NA-11 is to be expected under naturally relevant pH conditions.