Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.007 mg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.001 mg/L
Assessment factor:
10 000
Extrapolation method:
assessment factor

STP

Hazard assessment conclusion:
PNEC STP

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
5.4 mg/kg sediment dw

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.54 mg/kg sediment dw

Hazard for air

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
PNEC soil

Hazard for predators

Additional information

Results from acute tests with fish, Daphnia and algae are available. No long-term studies were performed. The lowest short-term aquatic toxicity test result is the fish (Cyprinus carpio) EC50 (96 h) = 6.9 mg/L (Acute toxicity test). As there are no long-term data available and the substance is rapidly degradable and the log Kow ≥ 4 (Styrene oxide has an n-octanol/water partition coefficient log Kow of 1.61 according to the peer-reviewed handbook) the substance is not to be classified as hazardous to the aquatic environment.

Conclusion on classification

According to Directive 67/548/EEC as well as GHS Regulation EC No. 1272/2008 styrene oxide is not classified as hazardous to the environment.