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Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Description of key information

Sodium azide is an inorganic substance, thus biotic degradation in the environment is an irrelevant process. Biotic processes may alter the speciation form of an element, but it will not eliminate the element from the environment by degradation or transformation processes. Furthermore, simulation tests of biological degradation are technically not feasible with sodium azide. According to REACH Annex XI, point 2, the guidance given in the test methods referred to in Article 13(3), more specifically on the technical limitations of a specific method, shall always be respected. The test guidelines relevant for biological degradation in surface water and/or water-sediment systems are OECD 308 and 309 (and their counterparts in EU Regulation 440/2008). The applicability of these test methods is explicitly restricted to organic chemicals. Therefore, as an inorganic compound, Sodium azde falls outside the technical feasibility domain of biological degradation testing.

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