Registration Dossier
Registration Dossier
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EC number: 236-751-8 | CAS number: 13473-90-0
Long-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
The partial life cycle tests ) yielded the lowest No observed Effect Concentration of 0.013 mg/L.
Key value for chemical safety assessment
Fresh water fish
Fresh water fish
- Effect concentration:
- 0.013 mg/L
Additional information
Two partial life-cycle studies were conducted for 60 days using Aluminium sulfate hexadecahydrate. Eyed eggs of brook trout and the resultant larvae and juveniles were exposed to various aluminium concentrations with a range of pHs. The lowest NOEC was determined for incomplete hatching and was 13 ug/L dissolved Al.
The survival of artificially implanted eggs, alevins and parr of brown trout Salmo trutta (L.) was assessed in streams of different acidity. LC50 values for aluminium were approximately 19 and 15 ug/L, respectively.
A 146 day chronic toxicity test was carried out to determine the effects of nitrate (NO3) on Lake Trout (Salvellinus namaycush). Based on nominal exposure concentrations the lowest 146-day NOEC was found to be 1.6 mg/L NO3-N for both average fry weight and developmental delay. This equates to approximately 7.1 mg/L NO3. The lowest LOEC was found to be 6.25 mg/L NO3-N, also for average fry weight and developmental delay. This equates to 27.65 mg/L NO3.
It can be concluded that the aluminium ion is the most toxic component of aluminium nitrate and therefore the NOEC of 0.013 mg Al/L obtained from the partial life-cycle test will be used for any further assessment.
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