LINEAR ALKYLBENZENE SULFONATE (LAS) - UNEP Chemicals

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OECD SIDS LINEAR ALKYLBENZENE SULFONATE (LAS) Test substance: Marlon A 390 (CAS #68411-30-3) C10-13 LAS, average alkyl chain length = 11.6; activity 91.3%, Remarks: Results show EC50 and EC10 values for two tests. Reference: Scholz, N. 1993. Bestimmung der bacterientoxizitat von Marlon A 390 in Pseudomonas-zellvermehrungs-Hemmtest. Huels-Final Report No. PZ- 93/10. Reliability: 2 Valid with restrictions (e) Type: Aquatic [X]; Field [ ]; Soil [ ]; Other [ ] Species: Pseudomonas putida (Bacteria) Exposure Period: 30 minute Results: EC50 = 350 mg/L EC0 = 250 mg/L Analytical monitoring: Yes [ ] No [ ] ? [X] Method: DIN 38412 Teil 27 (respiration inhibition test) GLP: Yes [ ] No [X] ? [ ] Test substance: Marlon A 350 (CAS #68411-30-3) C10-13 LAS, average alkyl chain length = 11.6 Remarks: Information as cited in IUCLID Data Sheet for CAS #68411-30-3. Data refer to 100% active ingredient. Reference: European Commission. 2000b. Benzenesulfonic acid, C10-13-alkyl derivs., sodium salts. Year 2000 CD-ROM edition, citing Henkel KGaA, unpublished results (Registry No. 5929). Reliability: 4 Not assignable (f) Type: Aquatic [X]; Field [ ]; Soil [ ]; Other [ ] Species: Pseudomonas putida (Bacteria) Exposure Period: 16 hour Results: EC50 = 150 mg/L EC0 = 50 mg/L Analytical monitoring: Yes [ ] No [ ] ? [X] Method: DIN 38412 Teil 8 (cell multiplication inhibition test) GLP: Yes [ ] No [X] ? [ ] Test substance: Marlon A 350 (CAS #68411-30-3) C10-13 LAS, average alkyl chain length = 11.6 Remarks: Information as cited in IUCLID Data Sheet for CAS #68411-30-3. Data refer to 100% active ingredient Reference: European Commission. 2000b. Benzenesulfonic acid, C10-13-alkyl derivs., sodium salts. Year 2000 CD-ROM edition, citing Henkel KGaA, unpublished results (Registry No. 5929). Reliability: 4 Not assignable (g) Type: Aquatic [X]; Field [ ]; Soil [ ]; Other [ ] Species: Pseudomonas putida (Bacteria) Exposure Period: 30 minute Results: NOEC = 64 mg/L Analytical monitoring: Yes [ ] No [X] ? [ ] Method: DIN 38412, Teil 27 GLP: Yes [ ] No [ ] ? [X] Test substance: C10-13 LAS, average chain length 11.8 (CAS #68411-30-3) Remarks: Information as cited in IUCLID Data Sheet for CAS #68411-30-3. Synthetic water; static; pH 7.2 + /-0.2; 20ºC. Effect: Inhibition of oxygen consumption. UNEP PUBLICATIONS 200
OECD SIDS LINEAR ALKYLBENZENE SULFONATE (LAS) Reference: European Commission. 2000a. Benzenesulfonic acid, C10-13-alkyl derivs., sodium salts. Year 2000 CD-ROM edition, citing Henkel KgaA. Reliability: 4 Not assignable (h) Type: Aquatic [X]; Field [ ]; Soil [ ]; Other [ ] Species: Pseudomonas putida (Bacteria) Exposure Period: 16 hour Results: NOEC = 30 mg/L Analytical monitoring: Yes [ ] No [X] ? [ ] Method: DIN 38412, Teil 8 GLP: Yes [ ] No [ ] ? [X] Test substance: C10-13 LAS, average chain length 11.8 (CAS #68411-30-3) Remarks: Synthetic medium; static; pH 7.4 + /-0.3; 21ºC. Effect: growth inhibition. Feitjel et al. reviews this study and also reports an NOEC = 35 mg/L for C11.6 LAS. Reference: Feijtel, T.C.J., Matthijs, E., Rottiers, A., Rijs, G.B.J., Kiewiet, A., and de Nijs, A. 1995. AIS/CESIO environmental surfactant monitoring programme. Part 1: LAS monitoring study in “de Meer” STP and receiving river “Leidsche Rijn” Chemosphere 30:1053-1066. Reliability: 4 Not assignable (i) Results: Based on digester performance, even a high and atypical concentration of LAS (30 g/kg) did not inhibit microbial populations present in STP activated sludge digesters. Remarks: The study was designed to monitor LAS during the different steps of 9 different standard sewage treatment plants operating mainly with domestic sewage. LAS-specific analytical methods were used. More details on the study can be found in the summary at 3.2(f). Reference: Berna, J.L., de Ferrer, J., Moreno, A., Prats, D. and Ruiz Bevia, F. 1989. The fate of LAS in the environment. Tenside Surf. Det. 26:101-107. Reliability: 4 Not assignable. Treatment plant operational records are not available for review. 4.5 CHRONIC TOXICITY TO AQUATIC ORGANISMS 4.5.1 CHRONIC TOXICITY TO FISH (a) Type of Test: Static [ ]; semi-static [X]; flow-through [ ] Open-system [X]; closed-system [ ]; not stated [ ] Species: Brachydanio rerio (Zebra Fish, fresh water) Exposure Period: 14 days Effect Criteria: Mortality, behavior Results: NOEC = 2.0 mg/L LOEC = 4.0 mg/L Analytic Monitoring: Yes [ ]; No [X]; ? [ ] Method: Based on UBA-Verfahrensvorschlag:Verlaengerter Toxizitaetstest beim Zebrabaerbling Brachydanio rerio, Bestimmung der Schwellenkonzentration der letalen und anderer Wirkungen, NOEC, mindestnes 14 Tage. This method conforms with OECD Guideline 204. Ten fish were exposed to each of seven concentrations (0.2, 0.4, 0.8, 1.6, 2.0, 4.0 and 8.0 mg/L) and the controls. Test chambers were 10-L basins containing 5-L of copper- and chlorine-free drinking water, maintained in a 16:8 light:dark illumination UNEP PUBLICATIONS 201
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LINEAR ALKYLBENZENE SULFONATE (LAS) - UNEP Chemicals

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