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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
0.42 µg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
4.2 µg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.04 µg/L
Assessment factor:
10 000
Extrapolation method:
assessment factor
PNEC marine water (intermittent releases):
0.42 µg/L

STP

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

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.031 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:
no exposure of soil expected

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

N-butyl-4,4 -bis(tert-butylperoxy)valerate has a Log Kow of 6.34 (OECD 117) and is not rapidly biodegradable.

Aquatic data are available from short-term toxicity tests at 3 trophic levels: the lowest available toxicity value has been obtained with algae corresponding to ErC50 of 421.5 µg/L. For the other trophic levels, crustacean and fish, no acute aquatic toxicity has been observed.

The only long-term aquatic toxicity data is available for algae corresponding to ErC10 of 160.5 µg/L.

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

Acute aquatic hazard: category Acute 1, M-factor: 1;

Long-term aquatic hazard: category Chronic 2.