Registration Dossier
Registration Dossier
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EC number: 212-751-3 | CAS number: 866-81-9
Toxicity to terrestrial arthropods
Administrative data
Link to relevant study record(s)
Description of key information
NOEC(28d, mortality) = 311 mg Tricobalt dicitrate/kg soil dw for the springtail Folsomia candida
Key value for chemical safety assessment
- Long-term EC10, LC10 or NOEC for soil dwelling arthropods:
- 311 mg/kg soil dw
Additional information
Data on soil-dwelling invertebrates resulting in high quality EC50/NOEC values (expressed as Co) are stated in Chapter 10.3 of the WHO CICAD document, 2006 (see attached report in Chapter 13).
The only study on an arthopod species, the springtail Folsomia candida, was conducted according to ISO-Guideline 11267 on two different soils (artifical soil according to OECD 207 and standardised field soil LUFA 2.2). The more sensitive 28-day NOEC of 100 mg Co/kg soil dw (311 mg/kg soil dw, recalculated for Tricobalt dicitrate) was measured on standardised field soil (pH CaCl2 5.49) while on artificial soil with a pH(CaCl2) of 7.14, the 28-day NOEC was found at 1000 mg Co/kg soil dw (3110 mg/kg soil dw, recalculated for Tricobalt dicitrate). Cation exchange capacity and pH are indicated as main factors influencing cobalt bioavailability.
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