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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Test substance CAS: 161907-77-3 (reaction mass of TEGBE-TetraEGBE: OECD301D: 76% in 28days, Readily biodegradable

Test substance CAS 9044-77-3 (Poly(oxy-1,2,-ethanediyl), α-butyl, ω-hydroxyl) OECD301D; 69% in 28 days, Readily biodegradable.

Test substance CAS 143-22-6 (2-(2-(2-butoxyethoxy)ethoxy)ethanol): OECD301E: 88% in 14 days: readily biodegradable

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

In a guideline (OECD 301D) and GLP ready biodegradability study, a multi-constituent substance of tri and tetraethylene glycol butyl ether gave a positive result (>60% degradation relative to the COD value) with a maximum of 76% biodegradation recorded on day 28. In a similar GLP study to the same protocol, the substance "Poly(oxy-1,2-ethanediyl), α-butyl-ω-hydroxy" attained 69% degradation after 28 days. Both substances are glycol ethers consisting predominantly of 3 -4 units of ethylene oxide and butanol. The results indicate that these and similar substances can be considered as ready biodegradable under the strict terms of this definition. The BOD5 value for this substance (nominal concentration 50 mg/l) was determined to be 3.23 mg O2/L. The COD value for BP DCP 208 was determined to be 97.33 mg O2/L. In a guideline (OECD 306) and GLP biodegradability study in seawater, DCP 208 gave a positive esult (>60% degradation relative to th COD value) with a maximum of 70% recorded on day 28. It may therefore be concluded that there is a potential for ready biodegradation under marine environmental conditions.