Registration Dossier
Registration Dossier
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EC number: 208-849-0 | CAS number: 543-80-6
Toxicity to soil microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
Additional information
According to Column 2 of Annex IX of REACH (section 9.4. Effects on terrestrial organisms), in the absence of toxicity data for soil organisms, the equilibrium partitioning method may be applied to assess the hazard to soil organisms. The choice of the appropriate tests depends on the outcome of the chemical safety assessment. Soil toxicity tests with barium di(acetate) are not considered to be required for the following reasons:
(I) Toxicity of barium dichloride to the respiration of micro-organisms was not observed in a guideline study with activated sludge up to 1,000 mg BaCl2/L (Egeler, 2010). A similar low toxic potential may be assumed for soils. A study with acetic acid is considered not to be required since the substance is rapidly degraded and transferred to microbial biomass to a large extend and has a beneficial effect on the growth rate of the activated sludge bacteria.
(II) Neither barium nor acetate have a high potential to partition into soil and predominantly exist as ionised forms. In sum, the low toxic potential of barium di(acetate) to micro-organisms and the low potential to adsorb to soil indicate a low if any toxic potential of barium di(acetate) in soil. Therefore, it is not justified to conduct any further terrestrial toxicity study with barium di(acetate).
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