Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0 mg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
0 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:
no hazard identified

Sediment (freshwater)

Hazard assessment conclusion:
no hazard identified

Sediment (marine water)

Hazard assessment conclusion:
no hazard identified

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
PNEC soil
PNEC value:
0.213 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Acute studies with the three trophic levels fish, daphnids and algae have been performed according to OECD TGs and in compliance with GLP. The 96 h-LC50 for Oncorhynchus mykiss exceeded the highest concentration tested of 0.3 mg/L. For Daphnia magna, the 48 h-EC50 was determined to be > 0.1 mg/L. The test with Desmodesmus subspicatus revealed a 72 h-EC50 of > 0.025 mg/L.

A study with activated sludge has not been performed as sewage treatment plants are no compartment of concern for exposure to Di-2 -EHTDG. Furthermore, the substance is insoluble in water and readily biodegradable and thus, a test is not required.

Conclusion on classification

Di-2-EHTDG does not need to be classified. The substance is highly insoluble in water and no effects on aquatic organisms were observed at concentrations corresponding to the water solubility. Furthermore, the compound is readily biodegradable and thus, long term effects on aquatic organisms are not expected.