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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The biodegradation and fate of 2,4 -di-tert.-butylphenol in different environmental compartments has been assessed in several OECD guideline studies, including screening and simulation tests.

Two screening studies have been conducted which assess biodegradability in water (activated sludge respiration inhibition test), an Inherent biodegradability test (Modified MITI Test II) according to OECD guideline 302C and a BOD-Test for Insoluble Substances. From the results of these tests it can be concluded that 2,4-di-tert-butylphenol does not readily biodegrade and is not inherently biodegradable.

Further evidence on the environmental fate of 2,4-DTBP is available from simulation studies in soil (aerobic/anaerobic), water-sediment systems (aerobic/anaerobic) and surface water (aerobic). The results obtained in those studies show that 2,4 -DTBP primarily volatilizes and undergoes only minor transformation processes.

In the surface water mineralization study, four major transformation products (>5% AR) were observed and identified by GC-MS as 2-tert-butyl-4-nitrophenol, 4-tert-butyl-2,6-dinitrophenol, 2-tert-butyl-4,6-dinitrophenol, and 2,4-di-tert-butylphenol. Based on the results of this study 2,4-di-tert-butylphenol would not be expected to hydrolyze in surface water or further mineralize to CO2 within 60 days, but would expect to dissipate from a surface water in the environment or degrade to multiple components.