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Environmental fate & pathways

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Imidazoline DETA

Only one valid ready biodegradability test results for Fatty acid C18 unsaturated diethylenetriamine imidazoline is available because fatty amine derivatives are usually toxic and/or poorly available to micro-organisms. Fatty acids C18 unsaurated reaction products with diethylenetriamine tested in the presence of silica gel were biodegraded 24% at day 28 in the Closed Bottle test. This test substance should therefore not be classified as readily biodegradable. In the enhanced (pro­longed) Closed Bottle test, Fatty acids C18 unsaturated diethylenetriamine imidazoline was biodegraded 61% at day 60 (AkzoNobel, 2010). The biodegradation reached at the day 60 demonstrates that Fatty acids C18 unsat. diethylenetriamine imidazoline is ultimately biodegradable and not persistent. The biodegradation and or hydrolysis products of Fatty acids C18 unsat. diethylenetriamine imidazoline i.e. fatty acids and diethylenetriamine are readily biodegradable also proving the ultimate degradation of Fatty acids C18 unsat. diethylenetriamine imidazoline.

 

Imidazoline PEPA

Fatty acids C18 unsaturated reaction products with polyethylenepolyamines were biodegraded 23% at day 28 in a MITI test. This test substance should therefore not be classified as readily biodegradable (IVL, 1983). More recently comparable results were obtained in Closed Bottle tests (van Ginkel et al, 2010). Partial biodegradation of Fatty acids C18 unsaturated reaction products with polyethylenepolyamines was anticipated because polyethylenepolyamines are not biodegradable. The biodegradation curves found demonstrate that Fatty acids C18 unsat reaction products with polyethylenepolyamines are readily converted into polyethylenepolyamines.