LINEAR ALKYLBENZENE SULFONATE (LAS) - UNEP Chemicals

OECD SIDS LINEAR ALKYLBENZENE SULFONATE (LAS)
Remarks: Initial cell concentrations were 20,000 cells/mL. Cell concentrations at 72 h
94, 91, 88, 76, 60, 54 and 7 (all x 10 4 /mL) for the control, 0.1, 0.4, 1.6, 6.4,
25 and 160 mg/L LAS concentrations, respectively. The pH ranged from 8.2
to 8.3 at the beginning of the study and 8.0 to 9.4 at the end of the study. Test
temperature was maintained at 24 ± 2 °C. This is a key study for aquatic
toxicity to algae (see SIAR Table 12).
Reference: Scholz, N. 1994. Bestimmung der Auswirkungen von Marlon A 350 auf das
Wachstum von Scenedesmus subspicatus 86.81. SAG
(Algenwachstumshemmtest nach Richtlinie 92/69/EWG) Huels Final
Report No. AW-372.
Reliability: 1 Valid without restriction
(h)
Species: Scenedesmus subspicatus (Algae)
Endpoint: Biomass [X]; Growth rate [ ]; Other [ ]
Exposure period: 96 hour
Results: EC50 = 5 mg/L
Analytical monitoring: Yes [ ] No [ ] ? [X]
Method: DIN 38412 Part 9
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. Test method conforms with OECD-Guideline
201.
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unpublished results (Registry No. 5929).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. The original study was not available for review.
(i)
Species: Scenedesmus subspicatus (Algae)
Endpoint: Biomass [ ]; Growth rate [X]; Other [ ]
Exposure period: 96 hour
Results: EC50 = 9 mg/L
Analytical monitoring: Yes [ ] No [ ] ? [X]
Method: Directive 87/302/EEC, part C, p. 89 “Algal inhibition test”
GLP: Yes [ ] No [X] ? [ ]
Test substance: C10-13 LAS, sodium salt; average chain length 11.6 (CAS #68411-30-3)
Remarks: Information as cited in IUCLID Data Sheet for CAS #68411-30-3. Huels
AG judged study quality to be good.
Reference: European Commission. 2000c. Benzenesulfonic acid, C10-13-alkyl derivs.,
sodium salts. Year 2000 CD-ROM edition, citing Huels AG, 1/90, N.
Scholz, unpublished.
Reliability: 4 Not assignable. The original study was not available for review.
(j)
Species: Scenedesmus subspicatus (Algae)
Endpoint: Biomass [ ]; Growth rate [X]; Other [ ]
Exposure period: 96 hour
Results: EC50 = 30 mg/L
Analytical monitoring: Yes [X ] No [ ] ? [ ]
Method: ISO 8692 “Water quality - Fresh water algal growth inhibition test with
Scenedesmus subspicatus and Selenastrum capricornutum”
GLP: Yes [ ] No [ ] ? [X]
Test substance: C11-13 LAS
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