Registration Dossier
Registration Dossier
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EC number: 268-460-7 | CAS number: 68092-47-7
Endpoint summary
Administrative data
Description of key information
Aquatic toxicity data of barium m-toluate are not available. Read-across to the assessment entities soluble barium substances and m-toluic acid is applied for the assessment of barium m-toluate since the ions of barium m-toluate determine its fate and toxicity in the environment. Reliable data available for soluble barium substances and m-toluate indicate that the moiety of ecotoloxicological concern are barium cations.
Acute (short-term) toxicity data: EC/LC50 values of 3 trophic levels (algae, invertebrates and fish) range for barium from > 1.15 mg Ba/L to 14.5 mg Ba/L and for m-toluate from 17.87 mg/L to 81.4 mg/L m-toluate.
Chronic (long-term) toxicity: NOEC/EC10 values of 3 trophic levels (algae, invertebrates and fish) range from ≥ 1.15 mg Ba/L to 2.9 mg Ba/L. For m-toluate, NOEC/EC10 values of 2 trophic levels (algae and invertebrates) range from 9.63 mg/L to 9.93 mg/L m-toluate.
The potential of barium cations for toxicity to aquatic microorganisms is low since the 3-h NOEC for respiration inhibition is >= 1000 mg/L BaCl2. An EC10 of 543 mg/L m-toluic acid (nominal) was derived for the 3-h respiration inhibition of activated sludge whereas the corresponding EC50 was also >= 1000 mg/L.
In sum, the potential of barium m-toluate for toxicity to aquatic organisms appears to be low.
Additional information
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