Registration Dossier
Registration Dossier
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EC number: 220-290-4 | CAS number: 2702-72-9
Toxicity to soil microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
No effects in nitrogen transformation or respiration rates of soil microorganisms were observed up to a concentration of 1.5 mg test substance/kg soil (0.93 mg a.i./kg soil)
Key value for chemical safety assessment
Additional information
No experimental data investigating the toxicity of sodium 2,4-dichlorophenoxyacetate (CAS No. 2702-72-9) to soil microorganisms 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 (Cycon, 2004) conducted according to OECD Guidelines No. 216, Soil Microorganisms, Nitrogen Transformation test and 217, Soil Microorganisms, Carbon Transformation test (2000), under GLP conditions. After 28 days of exposure in soil, no effects in nitrogen transformation or respiration rates of soil microorganisms were observed up to a concentration of 1.5 mg test substance/kg soil (0.93 mg a.i./kg soil) concentration.
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