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EC number: 216-721-0
CAS number: 1653-19-6
Measured 2,3-dichlorobutadiene-1,3 concentrations.
Test item Concentration (mg/l)
Geometric mean values for 2,3-dichlorobutadiene-1,3
The test concentrations 0.63 and 1.25 were calculated on the
basis of the mean recovery of the test concentrations 2.5, 5 and 10 mg/L.
Results of Daphnia study with 2,3-dichlorobutadiene-1,3
Mean measured concentration (mg/L)
Daphnia magna immobilisation
No. of Daphniaimmobilised
Daphnia magna were exposed to nominal 2,3-dichlorobutadiene-1,3
concentrations of 0 (control), 0.63, 1.25, 2.5, 5.0 and 10 mg/L for 48
hours under static conditions according to EU Method C.2 Acute toxicity
for Daphnia (2008). Geometric mean measured concentrations were
0.29, 0.58, 1.19, 2.39 and 4.32 mg/L in the nominal 0.63, 1.25, 2.5, 5.0
and 10 mg/L treatments. Based on mean measured concentrations the 24
hour EC50value was calculated to be 2.22 mg/L and the 48 hour
EC50value was 1.28 mg/L. The no-observed
effect concentration (NOEC) was observed to be 0.58 mg/L.
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