Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Biodegradation in water

The test item was investigated for its ready biodegradability in a MITI(I)-Test over a period of 28 days, in accordance with EC-method C.4 -F. The percentage biodegradation of the test item reached 4.18% after 28 days based on BOD. The test item was not considered to be have significant inhibitory effects on the secondary effluent microorganisms. Based on the results of this study, the test item is considered not readily biodegradable.

Biodegradation in water and sediment

The water solubility is 0.44 mg/l and therefore considered to be insoluble in water. Furthermore, based on the intended uses of the substance, direct and indirect exposure of sediment is unlikely. Therefore, this study was waived.

Biodegradation in soil

Based on the intended uses of the substance, direct and indirect exposure of soil is unlikely. Therefore, this study was waived.

Hydrolysis

The test item was found to be hydrolytically stable in the course of the preliminary test at 50°C at pH 7 and 9. The extrapolated half-life times at these pH-avlues at 25°C are therefore > one year (> 8760 hours). At pH 4, significant degradation occured in the pretest at pH 4 and 50°C, requiring further testing at 30, 40 and 50°C at this pH value. In the main study, t1/2 at pH 4 and 25°C was determined to be 576 hours. Identification of the degradation products was not feasible because of the low water solubility of the test item.

Bioaccumulation aquatic

Study was waived. Based on the intended uses of the test ite, direct and indirect exposure of the aquatic compartment is unlikely. A calculation of the BCF by the EPIWIN-software  showed an estlmated Log BCF of 2.510, corresponding to a BCF of 371.6 L/kg wet-wt.

Additional information

Source: GLP-reports & calculation