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Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Biodegradation test (OECD 301C), activated sludge, 28 days: not biodegradable

Additional information

The test substance 2,5-xylenol was assessed in an GLP-biodegaradtion study (KS_Biodegradation in water: screening tests_2005)) according to OECD Guildeine 301C (modified MITI Test (I)).

The test substance was incubated in activated sludge for 28 days at a concentration of 100 mg/L with a liquid volume of 300 mL at 25 +/- 1°C. The measurement of the biochemical oxygen demand (BOD) was performed by a closed oxgen consumption measurment device and the quantitative analysis of dissolved organic carbon (DOC) was performed by the analysis method of total organic carbon (TOC). Quantitative analysis of the test substance was done by high-preformance liquid chromatography (HPLC).

The test results were as follows:

BOD degradation rate: 0%, -1%, 0%, average 0%

DOC degradation rate: 2%, 3%, 1% average 2%

Test substance degradation (HPLC): 3%, 2%, 1%, average 2%

The test substance was not degraded by microorganisms under the conditions of the test.