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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Estimated values of the representative individual constituents :

pKa 1= 1.5 - 2.0  (of phosphoric acid, ester components)

pKa 2= 10.6 - 10.8  (of amine components)

Key value for chemical safety assessment

Additional information

The test substance is a complex mixture (UVCB) of individual substances with different solubilities therefore the pKa values could not be determined experimentally.

The dissociation constant has been generated on the representative individual constituents using recommended softwares ACD/Labs and SPARC. It can be concluded that the dissociation constant of test substance referred to ACD/Labs was estimated to be as follows:

pKa1= 1.5 - 2.0 (of phosphoric acid, ester components)

pka2= 10.6 - 10.8 (of amine components)