Registration Dossier
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EC number: 406-850-2 | CAS number: 133855-98-8 BAS 480 F
Toxicity to aquatic plants other than algae
Administrative data
Link to relevant study record(s)
Description of key information
The substance is acutely very toxic to aquatic plants
Key value for chemical safety assessment
- EC50 for freshwater plants:
- 0.004 mg/L
- EC10 or NOEC for freshwater plants:
- 0.001 mg/L
Additional information
The effects of epoxiconazole on Lemna gibba have been assessed in a GLP study conducted according to OECD Guideline 221 and ASTM EW 1415-91. This 7-day static toxicity study consist of two parts: one without sediment and one with the water-sediment test system. The endpoints for the test part without sediment were 7-d ErC10 of 1.9 µg/L and the 7-d ErC50 of 13.8 µg/L (initially measured, based on frond number, BASF AG, rep. no.: 2006/1031717, 2006).
The endpoint derived from the test system with sediment present was considered as not being of direct use in the risk assessment since epoxiconazole partitions rapidly to the sediment and thus reducing the exposure of free floating Lemna fronds. Measured concentrations of eposiconazole ranged from 97.4% - 129.9% (average of 106.6%) of nominal at test initiation and from 84.6% - 107 .0% (average of 97%, test without sediment) and 11.9 - 22.9 (test with sediment) of nominal at the test end.
Therefore, based on the available experimental data it can be concluded that epoxiconazole is acutely very toxic to aquatic plants.
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