Registration Dossier
Registration Dossier
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EC number: 202-327-6 | CAS number: 94-36-0
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.02 µg/L
- Assessment factor:
- 50
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.602 µg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.002 µg/L
- Assessment factor:
- 500
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 0.35 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0.013 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.001 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:
- 0.003 mg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
Conclusion on classification
Dibenzoyl peroxide has a Log Kow of 3.2 (OECD 117) indicating a low potential for bioaccumulation. The substance is classified as readily biodegradable.
The acute aquatic toxicity data (C(E)L50) based on the lowest of the available toxicity values is between 0.01 and 0.1 mg/L.
Tow long-term aquatic toxicity dataare available for two trophic levels: algae and invertebrates. The lowest long-term toxic data corresponds to EC10 of 0.001 mg/L(from OECD 211).
The aquatic hazard classification based on these data according to CLP criteria (Regulation No 1272/2008) is:
Category Acute 1, M-factor = 10
Category Chronic 1, M-factor = 10
One key study is available for each of the following endpoints:
Acute toxicity to Daphnia magna
|
Initial mean measured Dibenzoyl peroxide (mg/L) |
EC50 (48 h) |
0.110 [0.0765, 0.157] |
No observed effect concentration (NOEC) |
0.0765 |
[95% confidence limits]
Algal growth inhibition assay
|
Initial measured Dibenzoyl peroxide (mg/L) |
Area under the growth curve |
|
EbC50(72 h) |
0.0422 [0.0230, 0.0661] |
No observed effect concentration (NOEC) |
0.02 |
Average specific growth rate |
|
ErC50 (0 - 72 h) |
0.0711 [0.0643, 0.0729] |
No observed effect concentration (NOEC) |
0.02 |
Yield |
|
EyC50 (0 - 72 h) |
0.0613 [0.0248, 0.0687] |
No observed effect concentration (NOEC) |
0.02 |
[95% confidence limits]
Acute toxicity to fish
|
Initial mean measured Dibenzoyl peroxide (mg/L) |
EC50 (96 h) |
0.0602 [0.0477, 0.0856] |
No observed effect concentration (NOEC) |
0.0316 |
[95% confidence limits]
Chronic toxicity to invertebrates
|
Mean measured Dibenzoyl peroxide (mg/L) |
EC10 (21d) reproduction |
0.001 [0.0001, 0.0018] |
| No observed effect concentration (NOEC) |
0.0011 |
[95% confidence limits]
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