LINEAR ALKYLBENZENE SULFONATE (LAS) - UNEP Chemicals

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OECD SIDS LINEAR ALKYLBENZENE SULFONATE (LAS) Mean LAS concentration (mg/L) 4.4 1.9 1.0 0.4 0.2 Control Duplicate Chambers A B A B A B A B A B A B F1 Initial young numbers 0 0 4 9 32 37 29 59 52 58 77 91 Final F1 numbers F1 Females Males Females 0 0 3 3 3 10 8 25 11 11 26 19 0 0 0 3 4 16 7 24 9 16 22 31 % Survival 0 0 75 66 22 70 52 83 38 47 62 55 Final number gravid 0 0 0 0 1 3 2 4 8 Number of births Number F2 produced Reference: Arthur, J.W. 1970. Chronic effects on linear alkylbenzene sulfonate detergent on Gammarus pseudolimnaeus, Campeloma decisum and Physa integra. Water Res. 4:251-257. Reliability: 4 Not assignable. Test substance is a formulation containing a mixture of materials, of which only 14% is LAS. The contribution of each component cannot be separately assigned. (m) Species: Mysidopsis bahia (marine mysid) Results: NOEC = 0.12 mg/L (2 records) Test Substance: LAS normalized to C11.6 Remarks: NOEC is geometric mean of 2 records Reference: van de Plassche, E.J., de Bruijn, J.H.M., Stephenson, R.R., Marshall, S.J., Feijtel, T.C.J. and Belanger, S.E. 1999. Predicted no-effect concentrations and risk characterization of four surfactants: LAS, AE, AES, and soap, Environ. Toxicol. Chem. 18:2653-2663. Reliability: 4 This study was given a reliability score of 4 because the original reports reviewed by the authors were not directly reviewed in the compilation of this robust summary. (n) Type of test: static [ ]; semi-static [ ]; flow-through [X]; other [ ]; open-system [X]; closed-system [ ] Species: Gammarus pulex (amphipod) Endpoint: Mortality [X]; Reproduction rate [X]; Other [ ] Exposure period: Adults = 8 weeks; Juveniles = 15 weeks Results: LC50 (adults; 56 days) > 354 µg/L LC50 (juveniles; 107 days) > 375 µg/L NOEC (number of offspring) = 97 µg/L Analytical monitoring: Yes [X] No [ ] ? [ ] Method: Two separate groups of field-collected adults in the pre-copulatory amplexus and early juveniles were exposed to five concentration of LAS (nominally 30, 60, 120, 240, 480 µg/L) and control under flow-through conditions. The exposure vessel consisted of a plastic trough that was 40 cm by 10 cm. The water depth was approximately 3 cm with standpipe to drain and a 2 µm stainless steel piece of mesh was placed approximately 5 cm from the end of the vessel to prevent the loss of Gammarus. The solution was made up of a 1:1 mixture of pond water and carbon-filtered tap water. Mean measured UNEP PUBLICATIONS 216 11 5 17 0 0 0 0 0 0 0 1 2 3 6 5 0 0 0 0 0 0 0 32 45 48 109 74
OECD SIDS LINEAR ALKYLBENZENE SULFONATE (LAS) concentrations for adult exposure were
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LINEAR ALKYLBENZENE SULFONATE (LAS) - UNEP Chemicals

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