Registration Dossier
Registration Dossier
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EC number: 226-841-5 | CAS number: 5502-88-5
Ecotoxicological Summary
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 (acute daphnia and algae inhibition). Based on measured concentrations, the 48h EC50 of daphnia magna was determined to be 0.292 mg/L and 72h ErC50 of Pseudokirchneriella subcapitata to be >0.179 mg/L (no effects up to solubility limit). However, since the calculation for algae inhibition could only be made up to the solubility limit, the short-term hazard has been assessed based solely on the data for daphnia. Since the EC50 value for daphnia is < 1 mg/L, the substance is classified Category Acute 1 (H400) 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 levels (algae inhibition). However, since the calculation for algae inhibition could only be made up to the solubility limit, the long-term hazard has been assessed based solely on the data for daphnia. This is as follows:
The acute aquatic toxicity data for daphnia (EC50 = 0.292 mg/L) and environmental fate data (not readily biodegradable and log Kow of 6.0 for major component at 85% rpa), results in a Chronic 1 classification because the substance has an EC50<1, is not readily biodegradable and has a log Kow of >4.
Thus it is concluded that the substance is classified Category Chronic 1 (H410) for long-term (chronic) aquatic hazard according to the CLP Regulation 1272/2008/EC & adaptation 286/2011/EC.
According to Regulation (EC) No. 286/2011, Table 4.1.3, in order to classify a mixture containing the substance an M-factor of 1 should be used when applying the summation method since the EC50 is > 0.1mg/L and <= 1mg/L. The M-factor of 1 applies to both the Acute 1 and Chronic 1 classification.
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