Registration Dossier

Administrative data

Hazard for aquatic organisms

Hazard for air

Hazard for terrestrial organisms

Hazard for predators

Additional information

Conclusion on classification

Environmental classification and labelling of a substance is generally based on data from short-term aquatic toxicity results, the ready biodegradability of the substance and an experimentally determined BCF (or if absent the measured octanol/water partition coefficient). Available adequate chronic toxicity data is also relevant for the assessment of long-term aquatic hazards (Regulation 286/2011/EC).

 

Short-term aquatic toxicity data is available for two trophic levels (daphnia and algae). Based on valid short-term daphnia studies for two closely related structural analogues (nonanal and decanal), the daphnia 48 hour EC50 for (E)-dec-4-enal is estimated to be 1.17 - 1.54 mg/L. Based on valid algal inhibition studies for two closely related structural analogues (nonanal and undec-10 -enal), the 72 hour ErC50 for (E)-dec-4-enal is estimated to be 1.1-7.9 mg/L. Since all EC50 values are > 1mg/L the substance is not classified for short-term hazards to the aquatic environment according to the CLP Regulation 1272/2008/EC.

Chronic aquatic toxicity data is only available for one trophic level (algae). Therefore, the long-term hazard has been assessed based on both:

a) The chronic aquatic toxicity data for algae (NOEC = 0.34 -0.76 mg/L based on two analogues) and the fact that (E)-dec-4 -enal is readily biodegradable, which results in a Category Chronic 3 classification, and

b) The acute aquatic toxicity data for daphnia (EC50 = 1.17 - 1.54 mg/L based on two analogues) and environmental fate data for (E)-dec-4 -enal itself (readily biodegradable and log Kow of 3.5), which results in no classification,

and classifying according to the most stringent outcome.

 

Thus it is concluded that the substance is classified Aquatic Chronic 3 (H412) according to the CLP Regulation 1272/2008/EC & adaptation 286/2011/EC.

According to the old DSD regulation, Directive 67/548/EEC, the substance would be classified as R51/53 based on the EC50 values of >1 and < 10 mg/L and log Kow of > 3.