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Hazard for aquatic organisms

Hazard for air

Hazard for terrestrial organisms

Hazard for predators

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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. The daphnia 48h EC50 and algae 72h ErC50 values are both 12 mg/L. Since the EC50s 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 (72 hr EC10 = 2.3 mg/l, based on growth rate), which results in no chronic classification because the value is > 1mg/L, and

b) The acute aquatic toxicity data for the other trophic levels (daphnia 48h EC50 = 12 mg/L) and environmental fate data (readily biodegradable and log Kow of 4.7 -4.8), which result in a chronic 3 classification because the EC50 > 10 mg/L and < 100mg/L and the substance has a log Kow > 4,

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. 

Under the old DSD regulation the substance would not be classified as the L(E)C50 is > 10 mg/L and the substance is readily biodegradable.