Potassium 3-sulphopropyl methacrylate

Ecotoxicological Summary

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:

PNEC aqua (freshwater)

PNEC value:

0.026 mg/L

Assessment factor:

1 000

Extrapolation method:

assessment factor

PNEC freshwater (intermittent releases):

0.257 mg/L

Marine water

Hazard assessment conclusion:

PNEC aqua (marine water)

PNEC value:

0.003 mg/L

Assessment factor:

10 000

Extrapolation method:

assessment factor

STP

Hazard assessment conclusion:

PNEC STP

PNEC value:

0.5 mg/L

Assessment factor:

10

Sediment (freshwater)

Hazard assessment conclusion:

PNEC sediment (freshwater)

PNEC value:

0.118 mg/kg sediment dw

Extrapolation method:

equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:

PNEC sediment (marine water)

PNEC value:

0.012 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:

0.009 mg/kg soil dw

Extrapolation method:

equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:

no potential for bioaccumulation

Conclusion on classification

Classification based on biodegradation, bioaccumulation and acute aquatic data

Biodegradation:      inherently biodegradable (> 99% after 14 days), also readily biodegradable (BIOWIN (v4.10) estimation)

LogKow:                  -3.1 (KOWWIN (v1.68) estimation)

Aquatic acute toxicity

For fish: LC50 (96 h) > 2000 mg/L, (OECD 203, rainbow trout)

For aquatic invertebrates: EC50 (48h) > 100 mg/L (OECD 202, Daphnia Magna, read-across)

For algae: ErC50(72 h) = 25.72 mg/L, (OECD 201, Desmodesmus subspicatus, read-across)

Based on the data above, the substance is considered to be rapidly degradable and indicates a low potential for bioaccumulation.

Classification and labelling according to Regulation (EC) No.1272/2008 (CLP):

The criteria for classification of a substance in category Acute 1 are defined on the basis of acute aquatic toxicity data only (EC50 or LC50); classification is required for values ≤ 1 mg/L. Therefore, the substance does not need to be classified for acute (short-term) aquatic hazard.

No chronic data are available and hence, the result from the short-term tests have to be assessed according to the respective criteria for chronic aquatic hazard in combination with the biodegradation and bioaccumulation (log Pow as for this tonnage band BCF is not available) data; classification would be required as follows:

Category Chronic 1

96 hr LC50 (for fish) ≤1 mg/L and/or

48 hr EC50 (for crustacea) ≤1 mg/L and/or

72 or 96 hr ErC50 (for algae or other aquatic plants) ≤1 mg/L

and the substance is not rapidly degradable and/or the experimentally determined BCF ≥ 500 (or, if absent, the log Kow ≥ 4).

Category Chronic 2

96 hr LC50 (for fish) >1 to ≤10 mg/L and/or

48 hr EC50 (for crustacea) >1 to ≤10 mg/L and/or

72 or 96 hr ErC50 (for algae or other aquatic plants) >1 to ≤10 mg/L

and the substance is not rapidly degradable and/or the experimentally determined BCF ≥ 500 (or, if absent, the log Kow ≥ 4).

Category Chronic 3

96 hr LC50 (for fish) > 10 to ≤ 100 mg/L and/or

48 hr EC50 (for crustacea) > 10 to ≤ 100 mg/L and/or

72 or 96 hr ErC50 (for algae or other aquatic plants) > 10 to ≤ 100 mg/L

and the substance is not rapidly degradable and/or the experimentally determined BCF ≥ 500 (or, if absent, the log Kow ≥ 4).

Taking into account only the results from aquatic toxicity testing, classification as Category Chronic 3 would be triggered (algae: ErC50 (72 h) = 25.72 mg/L), but due to the fact that the substance has been considered as readily biodegradable and the log Pow is -3.1, the substance does not need to be classified for chronic aquatic hazard.