Registration Dossier
Registration Dossier
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EC number: 236-244-1 | CAS number: 13254-34-7
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.024 mg/L
- Assessment factor:
- 1 000
- PNEC freshwater (intermittent releases):
- 0.238 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.002 mg/L
- Assessment factor:
- 10 000
- PNEC marine water (intermittent releases):
- 0.238 mg/L
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 8 mg/L
- Assessment factor:
- 100
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0.89 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.089 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:
- 0.177 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
Environmental classification and labelling of a substance is generally based on data from short-term aquatic toxicity results, the ready biodegradability of the substance and an experimentally determined BCF (or if absent the measured octanol/water partition coefficient). Available adequate chronic toxicity data is also relevant for the assessment of long-term aquatic hazards (Regulation 286/2011/EC).
Short-term aquatic toxicity data is available for all three trophic levels (daphnia, algae and fish). Dimetol was predicted to have a 48-hr Daphnid EC50 of 24.18 mg/L and a 72 -hr Algae ErC50 of 23.77 mg/L using valid QSAR models. An acute fish study is available for Dimetol which gave a 96-hr LC50 of 23.9 mg/L. Since all EC50s are > 1mg/L the substance is not classified for short-term hazards to the aquatic environment according to the CLP Regulation 1272/2008/EC.
Chronic aquatic toxicity data is not available Therefore, the long-term hazard has been assessed based on the acute E(L)C50 data of >10 and <100 mg/L and environmental fate data (readily biodegradable and log Kow of 3), which results in no Chronic classification according to the CLP Regulation 1272/2008/EC and its adaption 286/2011.
According to the old DSD regulation, Directive 67/548/EEC, the substance would also not be classified for environmental hazards.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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