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Biodegradation in water: screening tests

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Description of key information

FAT 40825/A was not biodegradable under the test conditions within 28 days.

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

Test reports for ready biodegradation and inherent biodegradation tests are available. The results are summarized as below:

The test item FAT 40825/A was investigated for its ready biodegradability in a manometric respirometry test over 28 days according to EU Commission Directive 92/69 EEC, C.4-D (1992) and OECD Guideline for Testing of Chemicals No. 301 F (1992).

The biochemical oxygen demand (BOD) of the test item FAT 40825/A in the test media was in the range of the inoculum controls throughout the entire 28-day exposure period. Consequently, FAT 40825/A was not readily biodegradable under the test conditions within 28 days.

The test item FAT 40825/A was investigated for its potential (inherent) ultimate biodegradability in a Zahn-Wellens / EMPA test over 28 days, based on the OECD Guideline for Testing of Chemicals, No. 302 B (1992) and the EU Commission Directive 88/302/EEC, Part C.9 (1988). In the test flasks, containing the test item and activated sludge (inoculum), the mean concentration of DOC (dissolved organic carbon) varied between 94 and 101 mg/L over the 28-day exposure period, and was not significantly different from the initial mean DOC concentration of 101 mg/L, measured on Day 0 (starting value after 3 hours of exposure). Expressed as percentage DOC-removal, mean values in the range from 1 to 7 % were noted. FAT 40825/A was not biodegradable under the test conditions within 28 days.