Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.111 mg/L
Assessment factor:
1
Extrapolation method:
sensitivity distribution
PNEC freshwater (intermittent releases):
0.111 mg/L

Marine water

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

STP

Hazard assessment conclusion:
no hazard identified

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
19.25 mg/kg sediment dw
Assessment factor:
1
Extrapolation method:
equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
19.25 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:
4.01 mg/kg soil dw
Assessment factor:
1
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential to cause toxic effects if accumulated (in higher organisms) via the food chain

Additional information

Aquatic PNECs were derived using the equation that underlies the PETROTOX model and the soil and sediment PNECs were calculated using the equilibrium partitioning method.

Conclusion on classification

The lowest acute data point is a 48 hour EC50 of 4.4mg/L forDaphnia magnaread across from hexene. On the basis of this result hex-1-ene would be classified as “R51/R53 toxic to aquatic organisms and may cause long term adverse effects in the aquatic environment” under the DSD Directive, as although hex-1-ene is readily biodegradable it has a log Kow >3. However, hex-1-ene would not be classified under the EU CLP Regulations as it is readily biodegradable and has a log Kow <4.