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Ecotoxicological information

Toxicity to terrestrial plants

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Description of key information

No significant effects were observed in terrestrial plants after 21 days exposure at a concentration of 9 kg/ha

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No data on toxicity to terrestrial plants is available for disulfiram (CAS No. 97 -77-8).Therefore, a conclusion based on analogue approach had to be drawn. Zinc(bis) dimethyldithiocarbamate (CAS No. 137-30-4) which is structurally and composition related to tetraethylthiuram disulfide, was tested in two studies (Porch, 2006 a and 2006b). Both tests were conducted according to the EPA OPP 122-1 Guideline (Terrestrial Plant Toxicity Tier I), investigating the effect of this substance in seedling emergence and vegetative vigour respectively, under GLP conditions. No significant adverse effects were observed in any of these tests after 21 days exposure at a concentration of 9 kg/ha.

Long-term toxicity testing is not deemed necessary considering the expected rapid degradation of disulfiram in soil (half-life < 10 days) and the absence of toxic effects in the short-term studies performed with the analogue substance, zinc(bis) dimethyldithiocarbamate.