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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Readily biodegradable: 82% (O2 consumption) in 28 days

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

One ready biodegradation study is available for Fatty acids, C16-18, isopropyl esters (CAS No. 91031-58-2).

This key ready biodegradability study was carried out with Fatty acids, C14-18 (CAS No. 70750-32-2), following OECD Guideline 301 D and according to GLP (Richterich, 2001). Although the name and CAS No. differ from the substance to be registered, it is the same substance. Since in chemical analysis only C16-18 was found, the name and CAS No. of the substance were changed. The test material is still the same as the substance to be registered, although C14 incorrectly appears in the name. Effluent of domestic sewage treatment plant was used as inoculum. During the 28-day test period, biodegradation reached 82%, based on O2 consumption. The 14-day window criterion, defined for mono-constituent substances, was met, although it would not be required since the substance is a UVCBs. 

In conclusion, Fatty acids, C16-18, isopropyl esters (CAS No. 91031-58-2) can be considered as readily biodegradable according to OECD criteria.