Registration Dossier

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.