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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

There are no data available for (Z)-3,7-Dimethylocta-2,6-dienal itself. However, there are acute aquatic toxicity studies available for three trophic levels for the isomer 3,7-Dimethylocta-2,6-dienal (CAS 5392-40-5). Thus, the assessment is based on these data.

The most sensitive organism in acute toxicity testing was Leuciscus idus with a LC50 of 6.78 mg/l. In Daphnia magna an EC50 of 6.8 mg/l was determined. The EC50 detected in algae (Scenedesmus subspicatus) was 103.84 mg/l based on algal growth rate.

Chronic aquatic toxicity studies are not available. Considering the a/c-ratio, corresponding studies are not considered to have a relevant influence on the risk assessment and thus no further studies are proposed.

The PNEC calculations are based on the results of the acute toxicity test performed with L idus. For the sediment and terrestric compartments the equilibrium partitioning method has been used.

The PNEC STP was calculated using the EC50 of ca. 160 mg/l determined in a respiration inhibition test conducted with domestic, activated sludge.