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Publisher-reported update

2026-01-06

This study was conducted to support the environmental risk assessment of alkylbenzene sulfonates (ABS). The acute toxicity of three ABS (linear (n-ABS), branched (BABS), and alkyl phenoxybenzene (APBS) sulfonates), were evaluated on six aquatic organisms from different trophic levels (algae, daphnid, amphipod, mussel, snail, and fish). Endpoints related to survival, growth, and physiological changes were recorded to determine each species’ sensitivity to these surfactants. Chemical analysis was conducted to validate exposure concentrations. Comparisons between the three ABS were, however, conducted based on nominal concentrations, due to the absence of pure analytical standards for APBS. Results showed differences in sensitivity among compounds for all species exposed to environmental concentrations of ABS, except for snails, which showed similar sensitivity for all surfactants and were among the most tolerant species. Based on nominal concentrations, the EC50/LC50 for each n-ABS, BABS, and APBS varied. The most sensitive species to n-ABS were fish, mussels, and amphipods, while amphipods and mussels were the most sensitive to BABS and APBS, respectively. Species sensitivity was…

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