Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
3.38 µg/L
Assessment factor:
50
PNEC freshwater (intermittent releases):
21.7 µg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.338 µg/L
Assessment factor:
500
Extrapolation method:
assessment factor
PNEC marine water (intermittent releases):
2.17 µg/L

STP

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

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
0.687 mg/kg sediment dw
Extrapolation method:
equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.069 mg/kg sediment dw
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:
0.135 mg/kg soil dw
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

Conclusion on classification

The following data for aquatic toxicity and environmental fate of tert-butyl cumyl peroxide are available:

  • Biodegradability: the test item is not readily biodegradable
  • Log Kow = 4.40
  • Short-term toxicity to aquatic invertebrates: EC50 = 4.3 mg/L
  • Long-term toxicity to aquatic invertebrates: NOEC = 168.9 µg/L
  • Short-term toxicity to fish: LC50 = 2.17 mg/L
  • Toxicity to aquatic algae: no effect up to 100 mg/L (nominal concentration)

Based on these data, the following aquatic hazard classification should be applied according to CLP criteria (Regulation (EC) No 1272/2008):

Long-term aquatic hazard: Chronic category 2.