Registration Dossier
Registration Dossier
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EC number: 231-589-4 | CAS number: 7646-79-9
Toxicity to terrestrial plants
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
Additional information
From the database of chronic cobalt toxicity to higher plants, there are 83 individual high quality NOEC(L)/EC10 values for various endpoints (shoot yield, shoot length, root yield, root length) for 7 different species exposed to a variety of natural soils from Europe and North America and laboratory-derived artificial soils. When expressed as total soil Co, these range from 3.2 mg Co/kg dw for Medicago sativa (Kapustka and Eskew, 2000) to 647 mg Co/kg dw for Hordeum vulgare (Li et al, 2007). Below are the accepted high quality studies for terrestrial plants used for derivation of the HC5 and terrestrial PNEC.
Table X. High quality studies for terrestrial plants used for derivation of the HC5 and terrestrial plant PNEC
|
Species |
Added NOEC or EC 10 (mg Co/Kg dw) |
Total NOEC or EC10 (mg Co/Kg dw) |
Velicogna et al., 2010; Kapustka and Eskew, 2000 |
R. sativa (radish) |
8.5 -450 |
8.8 -453 |
Velicogna et al., 2010 |
E. labceolatus (northern wheatgrass) |
41.4 -521
|
44.4 -524 |
Li et al., 2007; Velicogna et al., 2010 |
L. esculentum (tomato) |
8.00 -423 |
9.5 -426 |
Velicogna et al., 2010 |
T. pratense (red clover) |
90.1 -513 |
93.1 -516 |
Li et al., 2007; Mico et al, 2008; Lock et al., 2007; Kaputska and Eskew, 2000 |
H. vulgare (barley) |
9.00-617 |
10.8-647 |
Li et al., 2007 |
B. napus (oil seed rape) |
17.0-102 |
18.5-113 |
Kapustka and Eskew, 2000 |
M. sativa (alfalfa) |
2.9 -13.7 |
3.2 -21.3 |
Long-term EC10/LC10 or NOEC for terrestrial plants: 2.9 -617 mg/kg soil dw (added Co).
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