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EC number: -
CAS number: -
Determination of the ready biodegradability and the inherent biodegradability of FAT 40863/A TE.
The inherent biodegradability study was performed to the test item
in an aerobic aqueous media. The method followed was designed to be
compatible with the OECD Guidelines for Testing of Chemicals (1992) No.
302B, “Inherent Biodegradability; Modified Zahn-Wellens/EMPA Test”.
The test item attained 0% biodegradation after 28 days.
OECD Guideline No 302B does not give any definitive pass levels
for test items, however the “Summary of Considerations in the Report
from the OECD Expert Group on Degradation and Accumulation” suggests
that a figure of more than 20% biodegradation may be regarded as
evidence for inherent, primary biodegradability. A figure of more than
70% mineralization may be regarded as evidence for ultimate
The test item cannot therefore be considered as inherently
biodegradable under the experimental conditions employed in this study.
The second experiment was performed to assess the ready
biodegradability of the test item in an aerobic aqueous media. The
method followed was designed to be compatible with the OECD Guidelines
for Testing of Chemicals (1992) No. 301F, “Ready Biodegradability;
Manometric Respirometry Test”.
The test item attained a mean degradation value of -26 %
biodegradation calculated from oxygen consumption after 28 days and
therefore cannot be considered to be readily biodegradable under the
strict terms and conditions of OECD Guideline No. 301F.
Statistical analysis carried on the Day 28 Biological Oxygen
Demand (BOD) values indicated a statistical difference between the test
item and inoculum control vessels, thereby indicating that the test item
may be exhibiting an inhibitory effect on the sewage treatment
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