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EC number: 253-057-0
CAS number: 36483-57-5
Fathead minnows (Pimephales promelas) were exposed to FR-513 at mean
measured concentrations of 0.68, 1.2, 2.5, 5.0 and 11 mg a.i./L under
flow-through conditions for 32 days. There were no statistically
significant treatment-related effects on hatching success at
concentrations ≤ 11 mg a.i./L. While there were statistically
significant increases observed in mean time to hatch in the 0.68, 1.2,
2.5, 5.0 and 11 mg a.i./L treatment groups, these increases were not
considered to be biologically meaningful since the increases were less
than one day and the data were not dose-responsive. There were
statistically significant decreases in post-hatch survival, overall
survival. NOEC and LOEC were 5.0 and 11 mg a.i./L, respectively.
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