Registration Dossier
Registration Dossier
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EC number: 284-943-5 | CAS number: 84989-53-7
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) = 6.31 mg/L
Algae: EC50 (72h) = 0.0659 mg/L
The criteria in Table 4.1.0 (a) of Annex I of the CLP Regulation were applied.
The lowest EC50 value was observed for algae, which is hence the most sensitive species. According to Table 4.1.0 (a) the substance should be classified for acute aquatic hazard, as the lowest EC50 value, 0.0659 mg/L, is below the cut-off for classification of 1 mg/L. Based on this EC50 value of 0.0659 mg/L an M-factor for acute of 10 applies.
Long-term (chronic) aquatic hazard:
For chronic classification, there are only chronic data available for one trophic level, aquatic plants (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) was 0.0438 mg/L, which is below the lowest cut-off value for classification: ≤ 0.1 mg/L. Therefore, according to this table, the substance should be classified for chronic aquatic toxicity, category 1.
Table 4.1.0 (b) (iii):
Classification based on available acute data available for the other trophic levels and environmental fate data:
Daphnia: EC50 (48h) = 6.31 mg/L
Log Kow = 0.77
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 lowest EC50 value for daphnia is > 1 and ≤ 10 mg/L and the substance is not readily biodegradable.
Most stringent chronic classification:
In conclusion the substance should be classified for chronic aquatic hazard, category 1.
Based on the chronic EC10 value of 0.0438 mg/L an M-factor for chronic toxicity of 1 applies.
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