Registration Dossier
Registration Dossier
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EC number: 908-084-9 | CAS number: -
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.9 µg/L
- Assessment factor:
- 1 000
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 9 µg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 90 ng/L
- Assessment factor:
- 10 000
- Extrapolation method:
- assessment factor
- PNEC marine water (intermittent releases):
- 0.9 µg/L
STP
- Hazard assessment conclusion:
- no hazard identified
Sediment (freshwater)
- Hazard assessment conclusion:
- no hazard identified
Sediment (marine water)
- Hazard assessment conclusion:
- no hazard identified
Hazard for air
Air
- Hazard assessment conclusion:
- no hazard identified
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- no hazard identified
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
Conclusion on classification
With respect to acute aquatic toxicity the EC50 for the most sensitive species (aquatic vertebrates, aquatic invertebrates, aquatic plants) was determined to be 0.90 mg/L (EC50 based on growth rate, algal inhibition study). In addition to the toxic effect seen in algae, B331 was observed to be toxic to both fish and daphnia however the toxic effect was less severe (relevant 50% effect concentrations were in the range 1-10 mg/L in each case). With respect to chronic aquatic toxicity the substance was observed not to be readily biodegradable; as chronic data are only available for aquatic plants (algae), the classification for chronic toxicity is considered with reference to the EC50 values for fish and daphnia, and the NOEC for algae.
With reference to Regulation (EC) 1272/2008 including amendments to the 4th May 2017 Appendix 1 table 4.1.0 (a) it is concluded that B331 meets the criteria for classification as Acute Category 1; the applicable hazard phrase is H400: "Very toxic to aquatic life". On the basis that the EC50 of the most sensitive species is in the range 0.1 mg/L - 1 mg/L and M-factor of 1 should be applied. Additionally in accordance with table 4.1.0 (b)(i) and (iii) it is concluded that B331 meets the criteria for classification as Chronic Category 2; the applicable hazard phrase is H411: "Toxic to aquatic life with long lasting effects".
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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