Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Biodegradation in water: screening tests

1,1'-(1,1,2,2-tetramethylethylene)dibenzene was assessed in a closed bottle test in accordance to OECD guideline 301 D and EU method C.4 VI. The test item was exposed to activated sludge from an aeration tank for 28 days. Under the test conditions the percentage biodegradation of the material reached a mean of 0.2 % based on ThODNH4. Thus, the test item has to be considered as not ready biodegradable.

Biodegradation in water and sediment: simulation tests

Direct and indirect exposure of the test item 1,1’-(1,1,2,2-tetramethylethylene)dibenzene to water and sediment is highly unlikely. The test substance is practically insoluble in water. In addition, low exposure is guaranteed, as no sludge application from STP on soil will be done and aerial deposition is negligible. Thus, simulation testing for biodegradation in water and sediment was considered not scientifically justified.

Biodegradation in soil

Direct and indirect exposure of the test item 1,1’-(1,1,2,2-tetramethylethylene)dibenzene to water and sediment is highly unlikely. The test substance is practically insoluble in water. In addition, low exposure is guaranteed, as no sludge application from STP on soil will be done and aerial deposition is negligible. Thus, simulation testing for biodegradation in soil was considered not scientifically justified.