Registration Dossier
Registration Dossier
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EC number: 251-823-9 | CAS number: 34090-76-1
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 2 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.79 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.2 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 0.699 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 27.1 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 2.71 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for air
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- PNEC soil
- PNEC value:
- 4.24 mg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Additional information
PNECs were derived from the study with the most sensitive species available for each compartment/endpoint.
Conclusion on classification
Acute toxicity:
Based on the results obtained in aquatic toxicity studies with a structural analogue of the substance, MTHPA, 4 -MTHPA need not be classified and labelled according to Directive 67/548/EEC (DSD) and Regulation 1272/2008/EC (CLP).
Chronic toxicity:
Based on the results obtained in long-term aquatic toxicity studies with a structural analogue of the substance, MTHPA, 4 -MTHPA need not be classified and labelled according to Directive 67/548/EEC (DSD) and Regulation 1272/2008/EC (CLP).
Overview of Results used for Classification and Labelling:
Fish, short-term, freshwater: LC50 (96 h)> 100 mg/L (Anonymous, 1997)
Fish, long-term, freshwater: NOEC(14 d) = 100 mg/L (Anonymous, 1997)
Daphnia magna, short-term, freshwater: LC50 (48 h) = 130 mg/L (Anonymous, 1997)
Daphnia magna, long term, freshwater: NOEC (21d) = 20 mg/L (Vertesi, 2010)
Algae, freshwater: LC50 (72 h) = 68 mg/L (Anonymous, 1997)
Hydrolysis: abiotic degradation = 5.69 min at 12 deg Cand pH 7
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