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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Biodegradation in water: screening tests

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Administrative data

Link to relevant study record(s)

Description of key information

Results of ready biodegradation tests from reliable studies:
BOD20 (freshwater, non adapted) = 88% (BOD10=74%)
BOD28=73-77 (Closed bottle)
BOD28=74-75 (Modified Sturm)
BOD5 (freshwater) = 91%
BOD20 (freshwater) = 72%
BOD15 (freshwater) = 76%
BOD20 (saltwater, non adapted) = 75% (BOD10=64%)
BOD5 (freshwater, adapted) = 73%; BOD5 (freshwater, non adapted) = 31%

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

A number of biodegradation studies have been carried out using both adapted and unadapted innoculii and in both fresh and saltwater. The key study clearly indicates that 2 -butoxyethanol is readily biodegradable in freshwater with non adapted bacterial populations. Other studies support this conclusion and also provide evidence that adapted bacteria degrade 2 -butoxyethanol more rapidly than unadapted colonies. There is only a single study available in saltwater. This study suggested slightly slower degradation than in freshwater but still sufficiently rapidly that the substance can be regarded as readily biodegradable in salt water.