Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

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.