Registration Dossier
Registration Dossier
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EC number: 241-749-5 | CAS number: 17766-26-6
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.126 mg/L
- Assessment factor:
- 50
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.521 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.013 mg/L
- Assessment factor:
- 500
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 16.8 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 1.202 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.12 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:
- 0.167 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: No biodegradation observed (OECD 302 B)
Log Kow: 0.73 at pH 4, 0.01 at pH 7, -1.55 at pH 9 (ACD/LogD Suite Program, v12)
Acute toxicity:
- to Fish: LC50 (96 h) > 137.2 mg/L for Oryzias latipes (OECD 203), recalculated value
- to aquatic invertebrates: EC50 (48 h) = 52.1 mg/L for Daphnia magna (OECD 202), recalculated value
- to Algae: ECr50 (72 h) > 130.2 mg/L, for Pseudokirchneriella subcapitata (OECD 201), recalculated value
Chronic toxicity:
- to Fish: not available
- to aquatic invertebrates: NOEC (21 d) = 6.31 mg/L for Daphnia magna (OECD 211), recalculated value
- to Algae: NOEC (72 h) = 7.8 mg/L for Desmodesmus subspicatus (OECD 201), recalculated value
Classification justification according to CLP
Based on the data above, TMT is considered to be not rapidly biodegradable. The acute aquatic toxicity L(E)C50 values are > 1 mg/L for fish, aquatic invertebrates and algae. Valid chronic toxicity data are available for invertebrates and algae with the lowest NOEC of 6.31 mg/L for Daphnia magna. Therefore, TMT 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 (2ndATP).
Classification justification according to DSD
Based on the data above, TMT is considered to have low potential for accumulation and is not rapidly degradable. Acute aquatic toxicity data are available for fish, aquatic invertebrates and algae, the lowest EC50 value is > 10 and < 100 mg/L for Daphnia magna. Valid chronic toxicity data are available for invertebrates and algae - the lowest NOEC is > 1 mg/L. Therefore, TMT does not need to be classified and labelled as environmental hazard according to the Directive 67/548/EEC.
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