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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Readily biodegradable: 94.4% in 28 days (OECD 301E, read across)

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

No studies investigating the ready biodegradability of l-Glutamic acid, N-coco acyl derivs., disodium salts (CAS No. 68187-30-4) are available. Thus, available data for the source substance l-Glutamic acid, N-coco acyl derivs., monosodium salts (CAS No. 68187-32-6) was used in a read-across approach. The read across is considered valid as both substances are structurally identical (solely differing in the degree of deprotonation being di- and monosodium salts, respectively), which assume very similar physico-chemical properties resulting in identical environmental behavior and ecotoxicity.

The read-across key study was performed according to OECD guideline 301E using polyvalent microorganisms as inoculum (Hoechst, 1989). Test substance concentrations of 4 – 50 mg DOC/L were tested. The test substance showed a biodegradation of 81.4% after 7 days and 94.4% after an incubation period of 28 days. Thus, the test substance is readily biodegradable according to OECD criteria. Due to the very high structural similarity, this result can also be considered for l-Glutamic acid, N-coco acyl derivs., disodium salts (CAS No. 68187-30-4).