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Environmental fate & pathways

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Two biodegradation studies (ready biodegradability and simulation test) were conducted by Hüls AG (1993) according to accepted guidance documents. The ready biodegradability was evaluated in a DOC-DIE AWAY Test over a test period of 28 days. In addition, the degradation was investigated in a modified Coupled Unit-Test (simulation test - aerobic sewage treatment) via DOC measurements following inoculation with activated sludge.

The mean biodegradability derived from the DOC-DIE AWAY Test was 8% indicating that the test item is not readily biodegradable. The simulation test resulted in 42.0% degradation within 31 days indicating that some degradation occurs in the sewage treatment plant.