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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

A weight of evidence approach was considered to be the most appropriate conclusion from the three data sources available. As two of the sources concurred the value 6.08 was selected for the pKa of 2,4,6-tribromophenol; one of which stated this figure as experimentally derived. All reports cite different sources of the data.

Key value for chemical safety assessment

pKa at 20°C:

Additional information

Reference: Rayne, S. and Forest, K. (2010)

Reliabilty: 4

Result: 6.08

Reference: OECD SIDS (2003) 2,4,6-Tribromophenol CAS No:118-79-6

Reliabilty: 4

Results: 5.97

Reference: Howe, P.D., Dobson, S. and Malcolm, H.M. (WHO)

Reliability: 4

Results: 6.08