Registration Dossier
Registration Dossier
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EC number: 202-849-4 | CAS number: 100-41-4
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.1 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.1 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.01 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 9.6 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 13.7 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 1.37 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:
- 2.68 mg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- PNEC oral
- PNEC value:
- 0.02 g/kg food
Additional information
Ethylbenzene is readily biodegradable and has a minimal potential for bioaccumulation.
Conclusion on classification
Acute (short-term) aquatic hazard:
Experimental data from acute toxicity studies show that the acute toxicity values are less than 10 mg/l (within the range 1-10 mg/l) for each of the three trophic levels. However as ethylbenzene is considered to be readily biodegradable it is not classified for acute toxic hazard under Directive 67/548/EEC.
Category 1 is the only acute toxic hazard for aquatic toxicity adopted by the EU CLP (Regulation (EC) No. 1272/2008) but ethylbenzene does not meet this criterion for classification. UN GHS adopts four categories of acute aquatic toxicity; therefore in non-EU countries that adopt UN GHS, ethylbenzene would meet the criteria to be classified as Acute Aquatic Hazard Category 2.
Chronic (long-term) aquatic hazard:
A 7-day study conducted with Ceriodaphnia dubia concluded a NOEC of 1.0 mg/l. Ethylbenzene is considered to be readily biodegradable. Therefore ethylbenzene has to be classified for chronic toxic hazard into Chronic category 3 (harmful to aquatic life with long lasting effects).
Environmental fate (biodegradation/bioaccumulation):
The biodegradation of ethylbenzene has been assessed in a guideline study. The result of this study demonstrates that ethylbenzene is readily biodegradable. Ethylbenzene has a Log Kow of 3.6 but is not expected to bioaccumulate (see PBT/vPvB assessment).
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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