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EC number: 603-094-7
CAS number: 125904-11-2
Table 5 (Reproduced from study report)
Cumulative Mortality, Immobility, and Observations
1 Observed Effects: AN = appear normal; Q,AN = trapped at surface but
appear normal after gentle submersion; C = lethargic; Q,C = trapped at
surface and appear lethargic after gentle submersion.
The cladoceran, Daphnia magna, was exposed for 48 hours under
flow-through conditions to five nominal concentrations of dibromostyrene
(DBS) ranging from 0.31 to 5.0 mg/L. The test was conducted according to
relevant OECD and EPA OPPTS guidelines. Based on the nominal test
concentrations, the 48-hour EC50 value was 1.4 mg/L, with a 95%
confidence interval of 1.2 to 1.6 mg/L. The no mortality/immobility
concentration and the NOEC were 0.31 mg/L.
The key study Palmer SJ et al (2005), was considered adequate for
assessment of the short-term toxicity to aquatic invertebrates as a
stand alone study. The study was conducted with guideline OECD 202 and
in compliance with GLP. The study was assigned a reliability score of 1.
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