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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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 main components of the substance are dodecanedioc acid (ca. 41%), undecanedioic acid (ca. 38%) and decanedioic acid (ca 7%). The pKa values of the main components of the substance were calculated each with the SPARC program. The pKa results were equal for the 3 main components: pKa(1) = 4.45 and pKa(2) = 5.05.

Key value for chemical safety assessment

pKa at 20°C:

Additional information

The pKa values are calculated at 25 C, but the pKa at 20 C is expected to be nearly equal (E. Humeres et al, J.Braz. Chem. Soc. 1 (3), p. 99 (1990)).