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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:
0.68 mg/L
Assessment factor:
1
Extrapolation method:
sensitivity distribution
PNEC freshwater (intermittent releases):
0.68 mg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.68 mg/L
Assessment factor:
1
Extrapolation method:
sensitivity distribution

STP

Hazard assessment conclusion:
PNEC STP
PNEC value:
13.61 mg/L
Assessment factor:
1
Extrapolation method:
sensitivity distribution

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
16.39 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:
2.89 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

PNECs were derived for freshwater, saltwater, sediment, and soil using the equation underlying the Petrotox model or equilibrium partitioning calculations.

The PBT assessment toxicity screening criteria are that an acute EC50 or LC50 <0.1 mg/L is considered to be T and that an EC50 or LC50 <0.01 mg/L indicates that the substance is definitely T. Experimental acute and chronic ecotoxicity data are available for toluene, with the most conservative results for each trophic level being: LC50 for fish of 5.5 mg/L, EC50 for Daphnia of 3.78 mg/L, EC50 for algae of 134 mg/L, NOEC for fish of 1.4 mg/L, NOEC for Daphnia of 0.74 mg/L and NOEC for algae of 10 mg/L. The acute effect concentrations are greater than the screening criteria and the chronic values are greater than the toxicity criteria stipulated in Annex XIII. Therefore, toluene is not considered to be T on the basis of the environmental criteria.

Conclusion on classification

Toluene is listed on Annex I of the DSD as having no environmental classification and this was harmonised to the CLP.

The lowest acute effect is a 48 hour EC50 forCeriodaphnia dubiaof 3.78 mg/L. Following the criteria for classifications under the CLP, this would not result in a classification for acute or chronic hazard to the environment.

Data on toluene indicates that it is readily biodegradable and is not expected to bioaccumulate. Toluene has a complete chronic data set. The lowest chronic effect is a 7 day NOEC of 0.74 mg/L forCeriodaphnia dubia.This results in a chronic Category 3 classification under the CLP Regulations. This has been added as a self classification to the dossier.