Registration Dossier
Registration Dossier
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EC number: 200-915-7 | CAS number: 75-91-2
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.002 mg/L
- Assessment factor:
- 1 000
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.015 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0 mg/L
- Assessment factor:
- 10 000
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 0.17 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0.006 mg/kg sediment dw
- Extrapolation method:
- sensitivity distribution
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.001 mg/kg sediment dw
- Extrapolation method:
- sensitivity distribution
Hazard for air
Air
- Hazard assessment conclusion:
- no hazard identified
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- PNEC soil
- PNEC value:
- 0.166 mg/kg soil dw
- Assessment factor:
- 1 000
- Extrapolation method:
- assessment factor
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- PNEC oral
- PNEC value:
- 1.4 mg/kg food
- Assessment factor:
- 300
Additional information
Short-term toxicity of TBHP to freshwater fish, invertebrates and algae has been determined experimentally. Algal growth inhibition proved to be the most sensitive indicator of toxicity and hence the 72h growth rate inhibition EC50 value for Selenastrum capricornutum was used as the critical indicator for calculation of PNEC values for aquatic organisms. The PNEC for STP microbes was calculated from an experimentally determined 30 -minute EC50 value for respiration inhibition in activated sludge. Sediment PNEC values were calculated from the freshwater organism EC50 data, based on equilibrium partitioning. The soil PNEC value was calculated from experimentally determined acute terrestrial organism (LC50) data.
Conclusion on classification
Based on the ErC50 result in the 72h freshwater algal growth inhibition test (1.5 mg/l) and the absence of degradation reported in tests of ready biodegradability, the classification of TBHP is concluded to be:
- under Directive 67/548/EEC criteria, R51/53
- under UN GHS criteria, hazardous to the aquatic environment, acute category 2 and chronic category 2.
- under Regulation 1272/2008 (CLP GHS) criteria, hazardous to the aquatic environment, chronic category 2.
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