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Ecotoxicological information

Toxicity to terrestrial plants

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Phytotoxicity of Tetrabutane to three terrestrial plant species has been determined in a seedling emergence test over a period of 21 days, according to OECD 208 (July 2006). The test was conducted with the nominal concentrations1000 - 500 - 250 - 125 - 62.5 mg/kgsoil dry weight (DW). After 21 days no test item related phytotoxic effects were observed for the tested plant species (oats,rape and soybean). The test substance did not cause any test item related effects > 25 % on the shoot height, the shoot fresh weight and the rate of emergence of the plant species oats and soybean at all tested concentrations. The EC50 values for shoot height, shoot fresh weight and seedlings emergence were >1000 mg/kg dw. For the plant species rape, the test substance caused test item related effects of 28 % on the shoot fresh weight at the concentration 500 mg/kg DW. No test item related effects were observed on shoot height and rate of emergence at all tested concentrations.