Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

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Additional information

Readily biodegradable potential of 124 Triazole has been investigated in the frame of an OECD 301 A test (Thiebaud, 1995). Under the test conditions it is concluded that 124 Triazole is not readily biodegradable.

In addition, an OECD Guideline 302B study (inherent biodegradability: Modified Zahn-Wellens Test) was performed. The test substance showed only a very low degree of degradation (1%) after 28 days (US EPA, 2009).

Nevertheless, a simulation biodegradation test in soil has been performed (Tarara, 2004) and it can be concluded that 1,2,4-triazole is degraded under the investigated conditions in northern and southern Europe with no observation of a significant vertical movement. The test item 1,2,4-triazole was significantly degraded at three test sites Burscheid, Albaro and Little Shelford within the course of the study and it was nearly completely degraded at site Vilobi d'Onyar. The slower degradation at this site can be explained by the temperature and rainfall to be below long-term averages at the test location for several months during the runtime of the study. Half-life were determined between 6.8 to 28.1d.