Registration Dossier

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.