Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
no hazard identified

Marine water

Hazard assessment conclusion:
no hazard identified

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:
no hazard identified

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential to cause toxic effects if accumulated (in higher organisms) via the food chain

Additional information

TCD-emulsifier is non-toxic to daphnids, fish and algae at maximum water solubility. Effects at higher nominal concentrations can be explained by attempts to dissolve the test substance using high-energy dispersion techniques and mechanical effects of the resulting dispersion (obstruction of the gills), rather than chemical toxicity of the TCD-emulsifier. No relevant hazard is identified. The substance is not considered as hazardous for STP microorganisms. For the terrestrial environment, lack of any hazard is concluded based on the principles of the equilibrium-partitioning method. This is supported by the no-observed-effect-concentration (NOEC) of ≥ 1000 mg/kg dry weight substrate in an earthworm short-term toxicity test (E. fetida, highest tested concentration).

Conclusion on classification

TCD-emulsifier is non-toxic to daphnids, fish and algae at the maximum water solubility. Effects at higher nominal concentrations can be explained by attempts to dissolve the test substance using high-energy dispersion techniques and mechanical effects of the resulting dispersion (obstruction of the gills), rather than chemical toxicity of the TCD-emulsifier. No relevant hazard is identified. Furthermore, TCD-emulsifier is predicted to be readily biodegradable (QSAR calculation). Therefore, despite the log Pow of approximately 5.9, the aquatic toxicity data and the ready biodegradability do not give rise for concern regarding adverse effects of the substance to the environment. Classification of TCD-emulsifier as hazardous to the aquatic environment is therefore not considered to be required.