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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Ready biodegradation studies:
BOD=102% in 20 days (OECD 301B)
BOD=73% in 20 days (OECD301D)
BOD=100% in 28 days (OECD 301C)

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

In a study which basically followed the methodology of a guideline closed bottle ready biodegradation study (OECD301D) and used non adapted sewage seed, 2 -(2-butoxyethoxy)ethyl acetate was found to be readily biodegradable, with 14% degradation after 5 days and 73% after 20 days.

In a biodegradation study according to OECD 301C, for which only basic details are available, 2 -(2-butoxyethoxy)ethyl acetate showed 100% degradation within 7 days. The substance is readily biodegradable according to this information.

A third ready biodegradation study is reported in a secondary source. This showed biodegradation of 67% in 20 days, which supports the results of the two studies described above.

A number of inherent biodegradation studies are available, mainly to OECD302B. These all clearly show that 2 -(2-butoxyethoxy)ethyl acetate is biodegradable, with levels of degradation between 35% after 60 hours and 97 -100% after 6 -15 days consistently reported. Degradation proceeded at about 7.5% per day after a lag period of around 4 days.