LINEAR ALKYLBENZENE SULFONATE (LAS) - UNEP Chemicals

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
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