Registration Dossier
Registration Dossier
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EC number: 203-656-8 | CAS number: 109-21-7
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Hazard for air
Hazard for terrestrial organisms
Hazard for predators
Additional information
Conclusion on classification
In order to determine the classification for hazardous properties related to the aquatic environment, the criteria of the Regulation (EC) No 1272/2008 (CLP) version 2016 in Annex I were accurately followed.
Short-term (acute) aquatic hazard:
For classification, acute toxicity data are available for aquatic invertebrates (Daphnia) and algae:
Daphnia: EC50 (48h) = 8.86 mg/L
Algae: EC50 (72h, growth rate) = 36.7 mg/L
The criteria in Table 4.1.0 (a) of Annex I of the CLP Regulation were applied.
The lowest LC50 or EC50 value was observed for Daphnia, which is hence the most sensitive species. According to Table 4.1.0 (a) the substance should not be classified for acute aquatic hazard, as the lowest LC50 value, EC50 (48h) for Daphnia is 8.86 mg/L, which is larger than the cut-off for classification of 1 mg/L.
Long-term (chronic) aquatic hazard:
For chronic classification, there are only chronic data available for one trophic level, algae. As described in Figure 4.1.1 in the CLP regulation (EC No 1272/2008, version 2016), the most stringent outcome of classification according to Table 4.1.0 (b) (i) or (ii) and (iii) should be used.
Table 4.1.0 (b) (i):
The substance is not readily biodegradable, hence Table 4.1.0 (b) (i) applies.
The EC10 (72h, growth rate) for algae was 23.1 mg/L, which is above the cut-off value for classification of 1 mg/L. Therefore, the substance should not be classified for chronic aquatic toxicity.
Table 4.1.0 (b) (iii):
Classification based on available acute data available for 2 trophic levels and environmental fate data:
Daphnia (48h) EC50 = 8.86 mg/L
Algae (72h, growth rate) EC50 = 36.7 mg/L
Log Kow = 2.16
The substance is not readily biodegradable.
Based on the criteria Table 4.1.0 (b) (iii), the substance should be classified as chronic aquatic toxic, category 2 since the substance is not readily biodegradable and the lowest EC50 values (Daphnia) is between 1 and 10 mg/L.
Most stringent classification:
The conclusion of both assessment is that the substance should be classified for chronic aquatic hazard, category 2.
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