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Environmental fate & pathways

Biodegradation in soil

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Description of key information

half life in soil < 3d at 25 ± 1°C

Key value for chemical safety assessment

Additional information

Since RAV 7NG contains as main ingredient 'diallyl 2,2'oxydiethyl dicarbonate' and experimental data are lacking for RAV 7NG, the experimental data from 'diallyl 2,2'oxydiethyl dicarbonate' were used in a read-across approach.

Justification for read-across from supporting substance RAV 7AT (diallyl 2,2'-oxydiethyl dicarbonate; CAS 142-22-3; EC 205-528-7): about 70 % of RAV 7NG (EC 700-483-4) consists of components that can be found in the commercial ADC grades known as RAV 7AT, Nouryset 200 and CR39. Merely from comparing the similar production processes of these two substances it is apparent that RAV 7AT and RAV 7NG are closely related to each other.  Finally, the physical-chemical, toxicological and ecotoxicological properties of RAV 7NG and RAV 7AT are almost equal and as a result, read across is justified.

This endpoint is filled from data from one biodegradability test with 'diallyl 2,2'oxydiethyl dicarbonate' in soil (no guideline followed; Williams, 1993).

The test substance 'diallyl 2,2'-oxydiethyl dicarbonate' was biologically degraded, chemically degraded, or volatilized in soil at 25 ± 1 °C to a level which was below the analytical detection limit (10 ppm) within 3 days [half life in soil < 3d at 25 ± 1°C]. Additionally, no degradates were observed in the soil extracts. Due to the disappearance of the test substance in both the sterile and nonsterile (test) system, it was not possible to characterize the extent of biodegradation.

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