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Ecotoxicological information

Ecotoxicological Summary

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Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.027 mg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
0.27 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:
2 mg/L
Assessment factor:
10
Extrapolation method:
assessment factor

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
62.58 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:
125 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Reliable studies are available for Daphnia (Inveresk 2001b, Inveresk Research, 2001d, Harlan Laboratories 2010), fish (Inveresk 2001a, Inveresk Research, 2001c) and algae (Inveresk 2001c, Inveresk Research, 2001e). The studies available are for Resin acids and rosin acids, esters with pentaerythritol, Resin acids and rosin acids, esters with glycerol and Resin acids and rosin acids, hydrogenated, Me esters.

Conclusion on classification

None of the members of this category appear on Annex I of the DSD.

Substances in the Rosin esters category with lower molecular weights are more toxic to aquatic organisms than those with higher molecular weights. 

The substances with the lowest molecular weights in the category are Resin acids and rosin acids, Me esters and Resin acids and rosin acids, hydrogenated, Me esters. The lowest EC50 available for these substances is 27 mg/L, from a Daphnia study with the test material Resin acids and rosin acids, hydrogenated, Me esters (Inveresk 2002). This result is read across to Resin acids and rosin acids, Me esters for classification purposes. As this EC50 is > 1 mg/L an acute environmental classification is not appropriate. Neither Resin acids and rosin acids, Me esters or Resin acids and rosin acids hydrogenated Me esters are readily biodegradable therefore as the lowest EC50 is >10 <100 mg/L a chronic classification of Chronic Category 3 is applied for both substances in accordance with the CLP regulation. Both substances are classified as R52 -53 under the DSD.

No effects were seen in the highest concentration tested in any of the acute ecotoxicity studies for higher molecular weight esters within the category, therefore none of the other category members are classified for the environment based on acute ecotoxicity results. Acute ecotoxicity testing is in progress for Resin acids and rosin acids, esters with ethylene glycol, the next largest molecular weight category member after the methyl esters, in order to ‘bookend’ this part of the category. Classification for this substance is currently based on read across from acute tests conducted for Resin acids and rosin acids, esters with glycerol and Resin acids and rosin acids, esters with pentaerythritol, and therefore no environmental classification is assigned. However, this will be reviewed following the results from the ecotoxicity testing being conducted using the substance itself.

No effects were seen in acute ecotoxicity studies with the higher molecular weight substances in this category. As these substances are poorly soluble and not readily biodegradable a chronic Daphnia study is proposed for Resin acids and rosin acids, esters with pentaerythritol in order to determine whether a Chronic category 4 classification is appropriate for these substances.