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EC number: 206-354-4
CAS number: 330-54-1
Hyallella azteca: NOEC (mortality) = 0.06 mg a.i./L
Two reliable chronic sediment toxicity tests with two different
species with different living and feeding conditions using spiked water
are available for diuron. The study with the midge Chironomus
riparius (Heimbach, 1993) was carried out according to a proposed
method for a Sediment Toxicity Test developed by BBA/IVA ad hoc Working
Group "Sediment Toxicity Tests" (Januar 1992). The resulting NOEC
(emergence) value for this water/sediment-system was >4 mg a.i./L
diuron. Gagliano & Bowers (1993) performed a Sediment Toxicity Test with Hyalella
azteca according to ASTM E1383 -94 and found a NOEC (mortality) of
0.06 mg a.i./L (initial mean measured concentration) based upon no
statistically significant difference in survivability and growth at this
concentration compared to the control.
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