3,7-dimethyloctanal

Ecotoxicological Summary

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). The lowest short-term EC50 is for daphnia, which is a 48-hour EC50 of 1.17 mg/l. Since the EC50 is > 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 (72 hr ErC10 = 0.543 mg/l), which results in chronic 2 classification because the value is <= 1 mg/L and substance readily biodegradable,

and

b) The acute aquatic toxicity data for daphnia (EC50 = 1.17 mg/L) and environmental fate data (readily biodegradable and log Kow 4.5). This results in a Category Chronic 2 classification,

and classifying according to the most stringent outcome.

 

Thus it is concluded that the substance is classified Aquatic Chronic 2 (H411) according to the CLP Regulation 1272/2008/EC & adaptation 286/2011/EC.