Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

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). The DT50 for AZDN in the water (OECD 309), determined by SFO kinetics, was 259 days at 1 µg/L and 950 days at 10 µg/L.


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.