LINEAR ALKYLBENZENE SULFONATE (LAS) - UNEP Chemicals

OECD SIDS LINEAR ALKYLBENZENE SULFONATE (LAS)
Species Endpoint EC10 EC50
Chenopodium album Growth 164
Amaranthus retroflexus Growth 142
Nigella arvensis Growth 132
Galinsoga parviflora Growth 90
Sorghum bicolour Growth 137
Helianthus annuus Growth 289
Phaseolus aureus Growth 316
Avena sativa Growth 50 300
Sinapis alba Growth 200 300
Test Substance: LAS (unspecified)
Remarks: Values are extracted from a variety of original references and compiled for
this article. NOEC values were extrapolated by applying an assessment
factor of 10 to the EC50. This is considered an unreliable assumption as
measured acute-to-chronic ratios for LAS in plants vary between 2 and 6.
Reference: Jensen, J., Lokke, H., Holmstrup, M., Krogh, P.H. and Elsgaard, L. 2001.
Effects and risk assessment of linear alkylbenzene sulfonates in agricultural
soil. 5. Probabilistic risk assessment of linear alkylbenzene sulfonates in
sludge-amended soils. Environmental Toxicology and Chemistry 20:1690-
1697.
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.
(b)
Species: Grass, beans, radishes, potatoes
Radiolabel: Yes
Results: No adverse effects on plant biomass were observed at the concentrations
tested [initial concentrations in soil = 27.2 mg/kg (grass, beans, radishes); =
16.2 mg/kg (potatoes)]
Temperature: Room temperature
Method: Soil cores taken from two ecosystems were collected and placed in a climate
controlled “plant metabolism box”. Ecosystem Section I consisted of a
heavy, clay-like soil. Radiolabeled LAS (a defined mixture) absorbed to
digested sludge was incorporated into the soils, after which the soils were
planted with either grass, bush beans and radishes (Section I) or potatoes
(Section II). The test systems were maintained under a defined standard
climate (i.e., an average day in June in Northern Germany) for the vegetative
period (76 and 106 days, respectively for Sections I and II). At the end of
the growing season samples were collected from plants and soil and
subjected to radioanalysis.
GLP: Yes [ ] No [ ] ? [X]
Test Substance: LAS. The authors state that they tested a defined mixture of LAS, but do not
report the composition in this paper.
Reference: Figge, K. and Schoberl, P. 1989. LAS and the application of sewage sludge
in agriculture. Tenside Surf. Det. 26:122-128.
Reliability: 2 Valid with restrictions
(c)
Species: radish, tomato, oats
Endpoint: Emergence [ ]; Growth [X]; Other [ ]
Exposure period: 14 day
Results: EC50 >77.1 mg/kg soil dw
NOEC = 25.7 mg/kg soil dw
Method: OECD Guide-line 208 “Terrestrial Plants, Growth Test”.
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