Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

In a guideline study in freshwater, the substance 2 -(2 -(2 -ethoxyethoxy)ethoxy)ethanol was found to be readily biodegradable. The BOD28 was 92.1%. The biodegradation was also assessed at a number of concentrations using a non-adapted domestic sewage innoculum in a freshwater medium. Ready degradation was observed with a BOD20 of 71%. In a single study in saltwater, ready biodegradation was not seen with only 22% degradation after 20 days.

The substance has a low octanol-water partition coefficient (log Kow = -0.5) and and is fully miscible in water. Based on these physical chemical properties, if released to water, the compound will remain in the water compartment. TEGEE has low potential for adsorption to soil or sediment or bioaccumulation in aquatic organisms. Mackay fugacity modelling (level 1) indicates that, in the absence of degradation, more than 98% of the substance would end up in the water phase with the remainder in the soil phase. Insignificant amounts would remain in the air and sediment phases. Level 3 fugacity modelling indicates that, taking into account degradation and using inflow parameters which are consistent with the known production tonnage of this substance in Europe, environmental concentrations in water are predicted to be below 100ug/l and soil and sediment less than 1ug/kg. This can be considered a worse case prediction as it assumes all product is emitted with no emission control systems used. Soil concentrations are unlikely to exceed significantly sediment concentrations and air concentrations are likely to be well below 2ng/m3. The only significant compartment of interest when it comes to fate of this product is the water compartment.

There is no specific information available on degradation pathways in the environment.