Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Hydrolysis:

The substance is hydrolytically stable at pH 4, 7 and 9. The half-life time at 25°C is > 1 year for pH 4, 7 and 9 (OECD 111, preliminary test).

Ready biodegradability:

Two ready biodegradation tests under OECD 301F and 301D exist and conclude to “not readily biodegradable”.

Under the conditions of the closed bottle test (OECD 301D), 15% after 28 days were reached. There are indications that the substance is ultimately biodegradable (60% after 98 days).

Moreover, under the Manometric Respirometry Test (OECD 301F), the pass level of > 60% ThOD of biodegradation is reached within 28 days. The ready biodegradation levels of the substance were 60.3% at day 28 and 64.9% at day 43.

Considering that 60% of ultimate biodegradation (complete mineralisation to C02) was reached within the 28-day period of the OECD 301F test, the substance is readily biodegradable but failing the 10 days windows criteria. Therefore it is possible to conclude that the substance is not persistent under relevant environmental conditions.

Adsorption/desorption coefficient:

Three test substance related peaks were observed in the HPLC screening test according to OECD 121. The resulting Koc and log Koc values of the substance at neutral pH are in the range 1800 -2700 and 3.26 -3.44, respectively. This indicates that when the substance would end up in the soil compartment it will be immobile there.