Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Hydrolysis:

In accordance with column 2 of REACH Annex VIII, a test on hydrolysis (required in section 9.2.2.1) does not need to be conducted as the substance is highly insoluble in water (< 3E-04 g/L). Furthermore, the substance does not contain any functional groups that are susceptible to hydrolysis.

Biodegradation:

According to the key study (CIBA, 1986) the ready biodegradability of the test item was assessed over a 28 day period by the modified Sturm test (OECD 301B). The results of this study indicates that the test item cannot be classified readily biodegradable under conditions of the test. This results will be supported by a seconde study where no degradation of the test item was observed.

In accordance with column 2 of REACH Annex VIII, further biodegradation test in water and sediment does not need to be conducted as the test substance was found to be poorly biodegradable in an OECD 301B study.

Bioaccumulation:

The bioaccumulation and depuration of the test item were studied with 14C-labeled test substance in rainbow trout maintained in a continous flow-through system in accordance with OECD guideline 305. Mean bioconcentration factors at steady-state were in the range 66 - 179. Accumulation of radioactive residues was in the order edible < whole-fish < non-edible tissues and well below 1000, therefore the test item is not considered to be bioaccumulative. Elimination of the test item during the depuration phase was relatively slow. Kinetic analysis indicated that approximately 90% of the radioactive residues were eliminated in 36 - 44 days.

Adsorption/Desorption:

Adsorption/Desoprtion of the test item on soil was determined in a study according to OECD Guideline 106. As a result of this study the following estimation of the adsorption-coefficient (log Koc) of the test substance could be made: log Koc is higher than 5.6.