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Ecotoxicological information

Toxicity to terrestrial plants

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ELR50 values (14 d, range) = 0.23 (Bellis perennis) to > 1.5 L test substance/ha (Avena fatua) (0.18 mg a.i./kg dw soil to > 1.24 mg a.i./kg dw soil)

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No experimental data investigating the toxicity of sodium 2,4-dichlorophenoxyacetate (CAS No. 2702-72-9) to terrestrial plants were available. Therefore, a conclusion on this endpoint was drawn based on the toxicity data of an analogue substance. Dimethylammonium 2,4-dichlorophenoxyacetate (CAS No. 2008-39-1) was tested in a study by Kaczynska (2006). This test was conducted according to OECD Guideline No. 208, Terrestrial Plant Test: Seedling Emergence and Seedling Growth (2006) under GLP conditions. Six plant species were exposed for 14 days to the test substance and effects on seedling growth and other parameters were reported. The resulting ELR50s ranged from 0.23 L test substance/ha (0.18 mg a.i./kg dw soil) for Bellis perennis to > 1.5 L test substance/ha (1.24 mg a.i./kg dw soil) forAvena fatua.