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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

According to a Mackay Level I model calculation the main target compartment for 1,5,9-cyclododecatriene will be the atmosphere (99.7 %), followed by sediment (0.1 %) and soil (0.1 %). The calculated Henry’s law constant of 6950 Pa m3/mol indicates high volatility of 1,5,9-cyclododecatriene from surface waters. With a calculated Koc of 6513 l/kg, the sorption potential of 1,5,9-cyclododecatriene to soil or sediment organic matter is expected to be high (Blume scale).


The combined half-life for OH radical and O3 molecule sensitized photodegradation reactions is approximately 23 minutes. While no ready biodegradation was observed in standard tests, all-trans-1,5,9-cyclododecatriene showed good biodegradability in a test with radiolabeled test substance at low concentrations. Atmospheric OH and ozone sensitized photodegradation plus biodegradation are expected to be the predominant ways of removal from the environment while photolytical or hydrolytical degradation in surface water are expected to be of minor importance. The partition coefficient 1-octanol/water of 1,5,9-cyclododecatriene was determined as log Kow = 6.80 at 25°C, indicating significant potential for bioaccumulation.