Registration Dossier
Registration Dossier
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EC number: 223-795-8 | CAS number: 4075-81-4
Long-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
The chronic 14 days – NOEC (mortality) of Ca(OH)2 to sand shrimp Crangon septemspinosa of 32.0 mg Ca(OH)2/L (nominal) as determined by Locke et al. 2009 is above OECD test limits of 10 mg/L for chronic toxicity testing of aquatic invertebrates. However, the NOEC should be evaluated with caution since a pH increase and not the calcium ions may have been responsible for the observed effect. Calcium concentrations (~ 400 mg Ca/L, Sverdrup et al. 1942) of natural sea water are typically above the NOEC-value from Locke et al. 2009 indicating that the observed effect was not due to elevated calcium concentrations.
Key value for chemical safety assessment
Additional information
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