Registration Dossier
Registration Dossier
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EC number: 232-164-6 | CAS number: 7789-41-5
Toxicity to terrestrial plants
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
Additional information
In a study by Vidakovic-Cifrek Z. et al. Cytogenetic damage in shallot (Allium cepa) root meristems induced by oil industry “high-density brines”, CaCl2, CaBr2 and their 1:1 mixture in concentrations of 0.075 and 0.1 mol/dm^3 significantly inhibited root growth in comparison with the control. The fraction of cells in mitosis after the treatment with all tested samples was significantly lower than in control.
In addition from a read across approach from sodium bromide, a study conducted following OECD No 208 was performed to assess the effects of sodium bromide on the emergence and growth of three plant species.
Read across from NaBr to CaBr2 is possible due to the full dissociation of both compounds in water. Na+ and Ca2+ are not toxic in the concentration ranges where Br- is toxic. Therefore only the Br- is responsible for the toxicity effects.
Three plant species were exposed to concentrations of 100, 180, 320, 560 and 1000 mg bromide/kg. The number of seedlings emerged and any mortalities and/or morphological abnormalities were determined daily for 21 days after 50% emergence in the control for each species.
The EC50 (emergence) and EC50 (growth) for the test material to the plants tested based on nominal test concentrations were greater than 1000 mg bromide/kg. The No Observed Effect Concentration for both emergence and growth was 1000 mg bromide/kg. However, morphological effects were observed thus the overall No Observed Effect Concentration was considered to be 180 mg bromide/kg to oat (Avena sativa).
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