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Ecotoxicological information

Ecotoxicological Summary

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Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.18 mg/L
Assessment factor:
10
Extrapolation method:
assessment factor

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.018 mg/L
Assessment factor:
100
Extrapolation method:
assessment factor

STP

Hazard assessment conclusion:
PNEC STP
PNEC value:
5.3 mg/L
Assessment factor:
10
Extrapolation method:
assessment factor

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
8.15 mg/kg sediment dw
Extrapolation method:
equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.815 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:
5.6 mg/kg soil dw
Assessment factor:
10
Extrapolation method:
assessment factor

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential to cause toxic effects if accumulated (in higher organisms) via the food chain

Additional information

Conclusion on classification

The short-term LC50 or EC50 values were 15.8, 25 and 6.7 mg/l, for fish, daphnia and algae, respectively, so between 1 and 10 mg/l. Cyclacet does not meet the criteria for readily/rapidly biodegradable. It can be concluded that the substance does not need to be classified as Aquatic Acute toxic according to EU CLP (EC 1272/2008 and its amendments).

Chronic toxicity data are available for algae on the substance itself and for fish and invertebrates via read-across from the structurally similar substance Cyclaprop. The lowest NOEC / EC10 from these chronic tests is a 21d-NOEC of 1.8 mg/L for Daphnia. Therefore, based on the available chronic data in combination with its non-rapidly degradability, Cyclacet does not need to be classified for long-term hazards to the environment according to EU CLP (EC 1272/2008 and its amendments) as the NOEC/EC10 values are above 1 mg/L.

For GHS: The acute toxicity of 6.7 mg/l for Cyclacet results in Acute Cat. 2 (H401).