Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

pKa 4.76, 20 °C, OECD 112, Jäkel 1998

Key value for chemical safety assessment

pKa at 20°C:

Additional information

The dissociation constant of the test material was determined in accordance with the standardised guideline OECD 112 using the spectrophotometric titration method. Under the conditions of the test, the test material was the test material was determined to have a dissociation constant (pKa) of 4.76 (acidic) at 20 °C.

The study was performed in line with GLP and an accepted standardised guideline with a high standard of reporting. The study was assigned a reliability score of 1 in accordance with the principles of assessing data quality outlined in Klimisch (1997), and considered suitable for assessment as an accurate reflection of the test material.

The available data are considered to be complete and the result determined, pKa 4.76 at 20 °C was taken forward for risk assessment.