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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Biodegradation in water: screening tests

Ready biodegradability test was carried out to find biodegradation of chemical 3,7-dimethylocta-2,6-dienenitrile. As inoculum a mixture of (proportion) 1: 1 of municipal sludge from laboratory wastewater treatment plants fed with municipal sewage and sludge from BASF wastewater treatment plant was used. The concentration of the dry substance was 30 mg/l. After 35 days the test substance was degraded up to 100 % (BOD of ThOD). Hence, the test chemical 3,7-dimethylocta-2,6-dienenitrile was found to be biodegradable(10 days window was not covered)with 59% biodegradation in 10 days.

Biodegradation in water and sediment: simulation tests

Estimation Programs Interface (EPI) Suite (2016) prediction model was run to predict the half-life in water and sediment for the test compound Citralva (CAS No. 5146 -66 -7). If released in to the environment, 20.7 % of the chemical will partition into water according to the Mackay fugacity model level III and the half-life period of Citralva in water is estimated to be 15 days (360 hrs). The half-life (15 days estimated by EPI suite) indicates that the exposure risk to aquatic animals is moderate to low whereas the half-life period of Citralva in sediment is estimated to be 135 days (3240 hrs). However, as the percentage release of test chemical into the sediment is less than 1% (i.e, reported as 0.354%), indicates that Citralva is not persistent in nature.   

Biodegradation in soil

The half-life period of Citralva (CAS No. 5146-66-7) in soil was estimated using Level III Fugacity Model by EPI Suite version 4.1 estimation database (EPI suite, 2016. If released into the environment, 78.8% of the chemical will partition into soil according to the Mackay fugacity model level III. The half-life period of Citralva in soil is estimated to be 30 days(720 hrs).Based on this half-life value of Citralva, it is concluded that the chemical is not persistent in the soil environment and the exposure risk to soil dwelling animals is moderate to low. 

On the basis of available information, the test substance Citralva can be considered to be readily biodegradable in nature