Registration Dossier
Registration Dossier
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EC number: 201-176-3 | CAS number: 79-09-4
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
With high probability acutely not harmful to aquatic algae
Key value for chemical safety assessment
Additional information
In a test with green algae (Scenedesmus subspicatus), the 72-hr ErC50 (growth rate) was calculated to be 48.7 mg/L [BASF AG, 1987]. In this study, the test solution was not buffered, resulting in low pH in the test solution. Aqueous solutions of calcium propionate do not display significant changes in pH and are therefore less toxic to aquatic organisms. For calcium propionate the 72-hr ErC50 for green algae (Scenedesmus subspicatus) is >500 mg/L [BASF AG, 1989]. The analogous substance was chosen in order to avoid the pH dependent effect of pure propionic acid solution.
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