Registration Dossier

Diss Factsheets

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
8.9 µg/L
Assessment factor:
10
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
8.9 µg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.89 µg/L
Assessment factor:
100
Extrapolation method:
assessment factor

STP

Hazard assessment conclusion:
PNEC STP
PNEC value:
10 mg/L
Assessment factor:
100
Extrapolation method:
assessment factor

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
3.2 mg/kg sediment dw
Assessment factor:
100
Extrapolation method:
assessment factor

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.32 mg/kg sediment dw
Assessment factor:
1 000
Extrapolation method:
assessment factor

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
PNEC soil
PNEC value:
35 411 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

For fish, aquatic invertebrates and algae, short term toxicity tests, no effects were measured up to the solubility limit in water accommodated Fraction type studies. However, the substance is readily biodegradable and thus could still be bioavailable to organisms. In some cases where no toxicity is observed in short term studies, chronic toxicity may be found as the critical body burden is not reached within the duration of the study. However, the limit of solubility cannot be technically determined and these studies are considered not technically feasible. In the environment, due to the high log Koc of this substance, the vast majority of the substance would be found in the sediment. A waiver is proposed for pelagic testing and a sediment test is instead conducted.

Conclusion on classification

Acute classification

The existing acute data for algae, fish and Daphnia show a NOEC value > 100 mg/L (loading). As all effect values are above 1 mg/L, there is no acute classification for this substance.

Chronic classification

Dilauryl peroxide is readily biodegradable, and the measured log Kow is >6.5 (estimated to be > 10.3). The only chronic data available is 72 h ErC10 algae, > 100 mg/L loading). When chronic data for less than 3 trophic levels are available the classification is assessed using both the existing chronic and acute data, and the most stringent outcome is chosen.

Based on chronic data: (72 h ErC10 algae, > 100 mg/L): No classification

Based on acute data (NOECs > 100 mg/L loading): No classification

Most stringent outcome:None

Overall classification: None