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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

EC50 (72 h) = 0.49 mg a.i./L (Pseudokirchnerella subcapitata)

Key value for chemical safety assessment

Additional information

One study investigating the toxicity of tetramethylthiuram disulfide (CAS No. 137-26-8) to algae species was available (Douglas, 1993). This test was conducted according to OECD Guideline No. 201: Algae, Growth Inhibition Test (1984), EPA OPP 122-2 Algal Toxicity Tiers I and II (1996) and EU Method C.3, under GLP conditions. Even though this test lasted for 120 hours, endpoint values were calculated at 72 hours too (standard exposure period). The results from this study show that tetramethylthiuram disulfide inhibited algal growth, resulting in a 72h-EC50 of 0.49 mg a.i./L and a NOEC ca. 0.0057 mg a.i./L. 

 

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