Registration Dossier
Registration Dossier
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EC number: 251-717-2 | CAS number: 33885-51-7
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.67 µg/L
- Assessment factor:
- 1 000
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.067 µg/L
- Assessment factor:
- 10 000
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 6.3 mg/L
- Assessment factor:
- 100
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0.106 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.011 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for air
Air
- Hazard assessment conclusion:
- no hazard identified
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- PNEC soil
- PNEC value:
- 0.978 mg/kg soil dw
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- PNEC oral
- PNEC value:
- 4 mg/kg food
Additional information
Conclusion on classification
Short-term aquatic toxicity data is available for all three trophic levels (daphnia, algae and fish). The lowest short-term EC50 is for daphnia, which is a 48h EC50 of 0.67 mg/L. Since the EC50 is <= 1 mg/L, the substance is classified Category Acute 1 (H400) for short-term hazards to the aquatic environment according to EU CLP (EC no. 1272/2008 and its amendments: Table 4.1.0; (a).
Chronic aquatic toxicity data is only available for one trophic level (algae). The 72hr ErC10 is 1.9 mg/l. According to CLP Figure 4.1.1, the chronic classification has to be determined based on the chronic value for algae according to Table 4.1.0, (b) i, as well as the acute value for Daphnia according to Table 4.1.0, (b) iii, and the most stringent outcome should be leading:
- The substance is not readily biodegradable and has a chronic toxicity value of > 1. Based on this information, the substance does not need to be classified according to Table 4.1.0, (b) i.
- The substance is not readily biodegradable, has a log Kow value of 4.3 and an acute toxicity value of ≤ 1 mg/L. Based on this information, the substance needs to be classified as Category Chronic 1 according to Table 4.1.0, (b) iii.
Overall, it can be concluded that the substance needs to be classified as Category Acute 1 (H400; M = 1) and Category Chronic 1 (H410; M = 1) according to EU CLP (EC 1272/2008 and its amendments).
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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