Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

2,2'-dimethyl-2,2'-azodipropiononitrile is not readily biodegradable, and has shown less than 10 % degradation in the 28 days biodegradation test (OCDE 301 B).

The aerobic biodegradation of [14C]-2,2'-dimethyl-2,2'-azodipropiononitrile has been studied in the laboratory at two concentrations (1 and 10 µg/L) in natural surface water, under dark conditions at 20 ± 2°C (OECD 309). Under these conditions, AZDN mineralised slowly with = 5% carbon dioxide formed within 60 DAT. Some degradation occurred within the water phase and at 60 DAT up to ca 11% of the applied AZDN was present as degradation products. The maximum level of any single degradation product was 6% applied radioactivity (AR).

No additional investigation is proposed for sediment or soil because they are not considered as the compartments of concern based on the intrinsic properties of the substance.