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EC number: 203-618-0
CAS number: 108-80-5
Table 1: No of surviving larvae on day 10
Number of larvae
Larvae unaccounted for
* mg test material/kg dry
weight of sediment (equivalent to 756 mg cyanuric acid/kg dry weight of
R7-R8 = replicates 7 and 8
prepared at the start of the study for sacrifice on day 10.
Table 2: Adult emergence data after 28 days
Number of fully emerged midges (out of 20/vessel)
R1-R6 = replicates 1 to 6
(replicates 7 and 8 in both groups were sacrificed at 10 days)
Table 3: Mean development rates
Nominal concentration* (mg/kg)
Mean development rate per vessel (fraction/day)
Overall mean development rate (fraction/day)
* mg test material/kg dry weight of sediment (equivalent
to 756 mg cyanuric acid/kg dry weight of sediment)
** Not calculated due to an emergence of greater than 20
R1 - R6 = Replicates 1 - 6
Table 4: Dry weight of surviving larvae of day 10
Nominal concentration (mg/kg)*
Total larvae dry weight (mg)
Mean individual larvae dry weight (mg)
R7 -R8 = replicates replicates
7 and 8 prepared at the start of the study for sacrifice on day 10
Sediment-water chironomid toxicity test according to OECD Guideline 218
with the monosodium salt of cyanuric acid.
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