Registration Dossier
Registration Dossier
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EC number: 200-837-3 | CAS number: 75-08-1
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0 mg/L
- Assessment factor:
- 1 000
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.001 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0 mg/L
- Assessment factor:
- 10 000
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 8.81 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0 mg/kg sediment dw
- Assessment factor:
- 1
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0 mg/kg sediment dw
- Assessment factor:
- 1
- 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 mg/kg soil dw
- Assessment factor:
- 1
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
PNECs were derived using freshwater experimental ecotoxicity results for ethanethiol and the read-across substance propane-2-thiol. The PNECS derived using experimental data were based on Klimisch 1 or 2 studies (Klimisch et al., 1997).
Conclusion on classification
The lowest acute reported acute aquatic toxicity result was a 48 hour EC50 for Daphnia magna of <0.1 mg/l. This result would indicate that ethanethiol meets the criteria for classification as Acute Category 1 and Chronic Category 1 according to the criteria of Regulation EC (No). 1272/2008 (as amended). The hazard phrases 'H400: Very toxic to aquatic life' and 'H 410: Very toxic to aquatic life with long lasting effects' apply. With the lowest acute result of EC50 <0.1 mg/L, ethanethiol falls within the multiplying factor category of 0.01 < L(E)C50 ≤0.1 and so an M-factor of 10 has been applied for both chronic and acute effects; 0% immobilisation was observed at a nominal test concentration of 0.05 mg/L at 48 hours.
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