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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Link to relevant study record(s)

Description of key information

(2E)-1-[(6-chloropyridin-3-yl)methyl]-N-nitroimidazolidin-2-imine is photolytically degraded in soil with a half-life of 38.9 d.

Key value for chemical safety assessment

Half-life in soil:
38.9 d

Additional information

The endpoint “phototransformation in soil” is not a data requirement for the registered substance. However, for the sake of completeness this endpoint is covered by a short summary of the available data.


One GLP-study on the photolytic degradation of the substance in soil is available. The photolysis study of (2E)-1-[(6-chloropyridin-3-yl)methyl]-N-nitroimidazolidin-2-imine on soil was carried out under continuous irradiation for maximum of 15 days by using an artificial light source at 25 ± 2°C. The study was done according to the EPA Guidelines Subdivision N Section 161-3 (1982). The radio-labeled parent compound was applied onto the soil layer at a concentration of 48.5 mg/kg. The sampling intervals were 0, 6 hours, 1, 2, 3 and 5 days (TEST I) and 0, 7, 12 and 15 days (TEST II). At the end of the irradiation for 15 days (TEST II), 91.6 % of the radioactivity applied was recovered and 61.5 % of the radiocarbon was found to be unchanged parent compound. The half-life of the substance was calculated by linear regression analysis to be 38.9 days (Rate constant K = 1.78 X 10E-02 1/day) under the conditions. The amount of radioactivity that could not be extracted from the soil ranged from 0.3 % to 11.0 % of the applied radioactivity. WAK 4103 was identified as the major photoproduct at the end of the irradiation period. It represented as much as 6.3 % of the applied radioactivity. None of the other extractable photoproducts was formed in amounts greater than 5 % of the applied radioactivity at any time during the irradiation.