Registration Dossier
Registration Dossier
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EC number: 435-740-7 | CAS number: 94317-64-3
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.28 mg/L
- Assessment factor:
- 1 000
- PNEC freshwater (intermittent releases):
- 2.8 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.028 mg/L
- Assessment factor:
- 10 000
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 1 mg/L
- Assessment factor:
- 10
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 1.097 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.11 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for air
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- PNEC soil
- PNEC value:
- 0.055 mg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
Conclusion on classification
Classification related key information
Biodegradation in water: screening tests: 9.51% (CO2 evolution) after 28 days (EPA OTS 796.3260)
Log Pow: 0.444 (EU method A.8)
Acute toxicity
- to fish: LC50 (96 h) = 1140 mg/L, Lepomis macrochirus (OECD 203)
- to invertebrates (crustacea): EC50 (48 h) = 290 mg/L, Daphnia magna (OECD 202, EU Method C.2)
- to algae: ErC50 (96 h) = 280 mg/L, Pseudokirchneriella subcapitata (OECD 201, EU Method C.3)
Chronic toxicity:
- to fish: not available
- to invertebrates: not available
- to algae: NOEC (96 h) = 75 mg/L, Pseudokirchneriella subcapitata (OECD 201, EU Method C.3)
Classification justification according to CLP
Based on the data above, NPBT is considered to be not rapidly biodegradable. The acute aquatic toxicity values, L(E)C50, are > 100 mg/L for fish, invertebrates and algae. Valid chronic toxicity data is available for algae with a NOEC > 10 mg/L. Therefore, NPBT does not need to be classified and labelled as environmental hazard according to the regulation (EC) No. 1272/2008 (CLP) and the Regulation (EU) No. 286/2011 (2nd ATP).
Classification justification according to DSD
Based on the data above, NPBT is considered to have low potential for bioaccumulation but is not rapidly biodegradable. The acute aquatic toxicity L(E)C50 is > 100 mg/L for fish, invertebrates and algae. The available aquatic chronic data on algae is > 10 mg/L. Therefore the substance does not need to be classified and labelled as environmental hazard according to the Directive 67/548/EEC.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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