Registration Dossier
Registration Dossier
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EC number: 263-174-9 | CAS number: 61791-42-2
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.08 mg/L
- Assessment factor:
- 50
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.046 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.008 mg/L
- Assessment factor:
- 500
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 5.13 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0.408 mg/kg sediment dw
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.041 mg/kg sediment dw
Hazard for air
Air
- Hazard assessment conclusion:
- no hazard identified
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- PNEC soil
- PNEC value:
- 0.035 mg/kg soil dw
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
Conclusion on classification
Classification related key information
Log Kow: < 3 (KOWWIN v.1.68)
Water solubility: > 250 g/L at 20 °C (EU A.6, flask method)
Biodegradation: 82 % in 28 days (OECD 301B)
Aquatic acute toxicity:
For fish: LC50(96h) = 5.04 mg/L for Danio rerio (OECD 203)
For algae: ErC50 (72h) > 100 mg/L for Desmodesmus subspicatus (OECD 201)
For crustacea: EC50(48h) = 4.6 mg/L for Daphnia magna (OECD 202)
Aquatic chronic toxicity:
For fish: not available
For algae: NOErC (72h) > 100 mg/L for Desmodesmus subspicatus (OECD 201)
For crustacea: NOECreproduction (21d) = 4 mg/L for Daphnia magna (OECD 211)
Non-Classification justification according to CLP
Based on the data above, Sodium methyl cocoyl taurate (CAS No. 61791-42-2) is considered rapidly degradable. The acute aquatic toxicity L(E)C50 values are above 1 mg/L for fish, algae and daphnia. Valid chronic toxicity data are available for algae and Daphnia – showing that the NOEC values are above 1 mg/L as well. Therefore, Sodium methyl cocoyl taurate (CAS No. 61791-42-2) 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).
Non-Classification justification according to DSD
Based on the data above, Sodium methyl cocoyl taurate (CAS No. 61791-42-2) is rapidly degradable and is considered to have a low potential for accumulation. The lowest acute aquatic toxicity L(E)C50 is in the range 1-10 mg/L for fish, algae and daphnia. Therefore, Sodium methyl cocoyl taurate (CAS No. 61791-42-2) does not need to be classified and labelled as environmental hazard according to Directive 67/548/EEC.
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