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EC number: 233-334-2
CAS number: 10124-43-3
Relevant and reliable data that
could be used for classification for freshwater invertebrates were
retrieved for 10 different species. The LC50s ranged from 0.61 mg Co/L
for the cladoceran, Ceriodaphnia dubia to 429 mg Co/L for the
midge, Chironomus tentans. Relevant and reliable data that could
be used for classification for marine invertebrates were retrieved for 4
different species. The LC50s ranged from 2.32 mg Co/L for the sand
dollar, Dendraster excentricus to 3.70 mg Co/L for the pacific
oyster, Crassostrea sp. Test results were obtained in experiments
that followed international accepted guidance and were based on measured
levels of dissolved cobalt as cobalt chloride.
the database of acute cobalt toxicity to freshwater invertebrates, 85
individual LC50 values for 10 different individual species were
reported. The LC50s ranged from 0.61mg Co/Lfor the cladoceran, Ceriodaphnia
dubia tested in soft, dissolved organic matter-free water (CDI,
2005) to 429 mg Co/L for the midge, Chironomus tentans (CDI,
2008). No freshwater acute invertebrate toxicity studies were used to
derive the HC5 and freshwater PNEC.
the database of acute cobalt toxicity to marine invertebrates, 20 NOEC
and EC50 values are reported for 6 species. The values range from 2.32
mg Co/L for the sand dollar, Dendraster excentricus (CDI 2010f)
to 3.70 mg Co/L for the pacific oyster, Crassostrea sp.(CDI
2010e). The table below represents the EC50 values of high quality
short-term freshwater aquatic invertebrate tests are used in the
freshwater PNEC derivation. Marine short-aquatic invertebrate tests are
used in the marine PNEC derivation; see Section 22.214.171.124.2.
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