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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Based on the data from several studies the test substance FAT 46014 is considered to be not biodegradable. 

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

A key study was performed to determine the ready biodegradability of FAT 46014/G in a 14 days MITI Test according to the OECD Guideline for Testing of Chemicals, No. 301C and the EEC-Directive, 79/831, Annex V, C.7., and in compliance with the Good Laboratory Practice (GLP).

The test substance was tested at a concentration of 100 mg/l. The reference substance sodium benzoate was also tested at a concentration of 100 mg/l.

Percent biodegradation of FAT 46014/G after 14 days was found to be 0 %. Considering the results, FAT 46014/G is considered to be not readily biodegradable. From the results of the toxicity control, no toxic effect of the biodegradation of the reference substance was observed.

Several other supporting studies showed the following results:

BOD5 is 190 mg/g O2

COD is 735 mg/g O2

COD is 1145 mg O2/g test mat.

One of the supporting studies which was carried according to regulation DEV DIN 38409 - H 41-1 (1980) corresponding to 92/96/EEC C.6 and carried out according to GLP, showed a range of COD of 1040-1250 mg O2/g.

Relevant is the BOD5/COD quotient which is not > 0.5 , therefore the substance is not indicative of rapid degradation.

Taking into consideration the data from key study and supporting studies, the test substance FAT 46014 is considered to be not biodegradable.