Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Photolysis:

The stability of the substance towards photolysis was investigated at two concentrations in deionised water and in an algae nutrient medium. Conditions for radiation, ventilation and nutrient medium corresponding those conditions used in ecotox testing. Under the same conditions, but in the dark, test solutions at the same concentrations were performed to serve as controls. Degradation was followed via HPLC analysis.

In deionised water half-life times of 9.2 days and 9.6 days were determined at 10 mg/l and 32 mg/l. In OECD nutrient medium half-life times of 3.2 days and 7.7 days at 10 mg/l and 32 mg/L were obtained. The longer half-life time obtained in the tests at the concentration of 32 mg/l in the presence of light may be due to hindered radiation of the molecules of the substance, as the solution was dark coloured. It is clearly demonstrated, that the susbtance is rapidly degradable by photolysis. Transformation products were not detected via HPLC.

Hydrolysis:

Hydrolysis of the substance is not expected, based on the absence of hydrolysable functional groups.

Biodegradation in water:

Within 28 days a degradation rate of 30 % was determined in a study for the inherent biodegradability of the substance. The substance is considered to be "Not Inherently Biodegradable". As only 30% of the substance are degraded in the inherent test study design a "ready biodegradability" of the substance can be excluded.

Bioaccumulation:

The bioaccumulation potential for the substance is expected to be very low, based upon its log Kow of -4.9.

Adsorption/desorption:

Based upon its log Kow, the adsorption/desorption potential for the substance is expected to be very low.