Registration Dossier

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.