Registration Dossier
Registration Dossier
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EC number: 208-933-7 | CAS number: 547-67-1
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
One study is used for the derivation of an acute toxicity reference value (Deleebeeck et al., 2004) at pH ranging from 6 to 7.9. Testing Pseudokircheneriella subcapitata, nickel toxicity increased with increasing pH with 72-h ErC50 values ranging from 125-81.5 µg Ni/L (pH 6-7.9, respectively). Since the value at pH 6 (125 µg/L) is the lowest toxicity value at that pH for any of the standard test species, this value is taken as the toxicity reference value for low pH.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 125 µg/L
Additional information
Nickel toxicity to P. subcapitata. |
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pH |
Hardness (mg/L as CaCO3) |
72-h ErC50 |
95% Confidence Interval |
6 |
21.2 |
125 |
119 - 133 |
6.5 |
21.5 |
145 |
136 - 156 |
6.9 |
20.5 |
148 |
* |
7.3 |
20.8 |
91.8 |
84.8 - 98.5 |
7.7 |
20.7 |
83.1 |
79.8 - 87.4 |
7.9 |
21.2 |
81.5 |
69.4 - 95.6 |
*No reliable confidence limits could be calculated. |
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