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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

2,4,6-tribromophenol was shown to be hydrolytically stable and to photodegrade in air with a half life of 4.6 hours and the half-life for photolysis in water was 11.5 hours.

Studies show that enriched cultures of bacteria from wastewater and in water/sediment systems are capable of biodegrading 2,4,6-tribromophenol through reductive debromination, with transformation to 4-bromophenol. Degradation rates depend in part on temperature and whether these were other food sources present for the bacteria. Rapid (36 hours) degradation of 2,4,6-tribromophenol was observed enriched cultures of bacteria isolated from a marine sediment. It can be reasonably concluded that the test material is inherently biodegradable in both freshwater and marine conditions.

2,4,6-tribromophenol is also rapidly biodegraded in soil under aerobic conditions, with a geometric mean half life of 7 days at 20°C (DT50 5 - 10 days, 3 soils), indicating non-persistence. Mineralisation to carbon dioxide and the formation of bound residues were demonstrated. No single degradation product was greater than 10%.

The values used for the CSA are as follows:

Hydrolysis: hydrolytically stable

Photodegradation half-life: 4.6 h

Photolysis half-life:11 hr

DT50 in soil: 7 d at 20°C

Biodegradability: Inherently biodegradable