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Long-term toxicity to aquatic invertebrates

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Description of key information

NOEC (21d) = 78 µg a.i./L (Daphnia magna)

Key value for chemical safety assessment

EC10, LC10 or NOEC for freshwater invertebrates:
78 µg/L

Additional information

The chronic toxicity of zinc bis dimethyldithiocarbamate (CAS No. 137-30-4) to Daphnia magna was investigated by Palmer et al. (2006). This test was performed according to OECD Guideline No. 211, Daphnia magna Reproduction Test (1998) and EPA OPPTS 850.1300, Daphnid Chronic Toxicity Test (1996), under GLP conditions. Daphnids were exposed for 21 days to the test substance within a flow-through water regime. Adverse effects on growth, survival and reproductive performance (measured as number of neonates per female) were reported, resulting in a NOEC of 78 µg a.i./L (based on reproduction).

 

An additional study investigating the chronic effects of zinc bis dimethyldithiocarbamate on population densities of Daphnia magna was available (Memmert, 2001). This test was conducted under GLP conditions for 10 weeks and a four-fold application of the test item was applied (at days 0, 7, 14 and 21). A NOEC of 10 µg a.i./L. was determined in this study.