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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Administrative data

Link to relevant study record(s)

Description of key information

Half life period of 4-(2,6,6-trimethylcyclohex-1-ene-1-yl)-but-3-ene-2-one in water observed 912 hrs (38 days). (half-life) while in sediment it is 8160 hrs (340 days).Based on these half life values of 4-(2,6,6-trimethylcyclohex-1-ene-1-yl)-but-3-ene-2-one, it is concluded that the chemical is readily biodegradable in water where as it is non biodegradable in sediment. Since there is low level of diffusion of the substance in the sediment as evident from the reported data (2% in sediment) hence persistence in the sediment compartment is not likely to be critical.

Key value for chemical safety assessment

Half-life in freshwater:
912 h
at the temperature of:
25 °C
Half-life in freshwater sediment:
8 160 h
at the temperature of:
25 °C

Additional information

Media

Half-Life 
(days)

Percent in
Each Medium

Water

38

  12%

Sediment

340

  2%