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EC number: 236-501-8 | CAS number: 13410-01-0
One reliable NOEC value for chronic selenate toxicity to reproduction of Folsomia candida was retrieved (Checkai et al., 2004; test substance disodium selenate). A NOEC of 2.23 mg Se/kg dw was derived by dividing the reported EC20 of 4.7 mg Se/kg dw by a factor 2. The NOEC was expressed based on added elemental Se concentration in soil and was taken forward to the derivation of the PNEC according to the statistical extrapolation approach
Only one reliable (Klimisch 2) result is available for the effect of Na2SeO4 to reproduction of the terrestrial arthropod Folsomia candida, reporting a NOEC of 2.35 mg Se/kg soil (calculated as EC20/2, based on added Se concentration; Checkai et al., 2004). No results were available for the effect of selenite on terrestrial arthropods.
Supporting information is available on the toxicity of various Se compounds to bees (Apis mellifera). The effects of organic ((methyl-)selenocysteine) and inorganic (selenite and selenate) selenium compounds in the diet (sucrose) on larval and forager stages were studied. EC50 values ranged from 0.72 to 161 mg Se/L. Organic selenium compounds were less toxic (> factor 3) then inorganic compounds, but differences selenite and selenate were limited. The most sensitive endpoint was found for the larval survival of Apis mellifera exposed to selenate (EC50 = 0.72 mg Se/L).
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