Acute toxicity of linear alkylbenzene (LAB) to Daphnia Magna

Linear Alkylbenzene, the raw material for the production of linear alkylben zene sulfonate (LAS), can enter the environment as a component of the unsul fonated material present in commercial detergent slurries. Although the pro duct is readily biodegradable and does not accumulate, information on the a cute toxicity of this product is not available at least for the representat ive material used in the European detergent market (CAS N degrees 67774-74- 7). We have carried out toxicity tests (acute) with Daphnia magna using the abo ve-mentioned LAB following OECD-202 guidelines for the acute immobilisation test under two versions; with solvent (acetone) and without. No toxic effects have been observed within the solubility limits of LAB in water.