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EC number: 216-653-1
CAS number: 1634-04-4
One reliable study of long-term toxicity to terrestrial organisms is available: Dodd and Addison, 2010 studied survival and reproduction in Collembola species (springtails). For the most sensitive of 3 species tested, Onychiurus folsomi, a 35-day NOEC for reproduction was determined (in sandy loam soil with a low organic matter content: 1.14%): this NOEC is taken forward for use in assessment. All of the other NOECs determined in the same study (using the 3 springtail species in OECD 207 artificial soil, plus O. folsomi tested also in sandy loam and silt loam) were at least twice as high as the O. folsomi (sandy loam) NOEC cited here.
Collembola reproduction guideline 232 was not available when this study
was performed, but the test method employed, including the artificial
soil used, was closely similar to that later recommended in the
guideline (and the Collembola species for which a NOEC of 156 mg/kg soil
dw was determined proved more sensitive to MTBE than Folsomia candida,
one of the species recommended in OECD 232).
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