Registration Dossier
Registration Dossier
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EC number: 202-411-2 | CAS number: 95-33-0
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.001 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.002 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 100 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0.183 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.018 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:
- 3.16 mg/kg soil dw
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- PNEC oral
- PNEC value:
- 26.4 mg/kg food
- Assessment factor:
- 30
Additional information
In up-to-date assessment, latest and more reliable data are found and hence used for the estimation of PNEC values. Therefore the PNEC values reported here are different in comparison to the ones in EU-risk assessment (2008).
Conclusion on classification
According to the Directive 67/548/EEC and the regulation (EC) No 1272/2008, CBS is legally classified as R50/53 and aquatic acute 1 (H400) and aquatic chronic 1 (H410), respectively.
The up-to-date information confirmed this classification and is summarised below:
- The most sensitive acute and chronic toxicity is to aquatic algae (Selenastrum capricornutum): 72h- ECr50 of 0.15mg/L and a NOEC of 0.0084 mg/L (MOE Japan, 1997).
- Estimated log Pow of 5 (Currenta, 2010), which is higher than 3.
- CBS is not readily biodegradable (Bayer AG, 1989).
With the data listed above, CBS should be classified as aquatic acute 1 (H400) and aquatic chronic 1 (410) according to GHS (Regulation EC 1272/2008) and as R50/53 according the Directive 67/548/EEC. The appropriate multiplying factors for acute and chronic toxicity are 1 and 10, respectively.
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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