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EC number: 939-464-2 | CAS number: 121617-08-1
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data

Toxicity to other aquatic organisms
Administrative data
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Acceptable, well-documented publication/study report which meets basic scientific principles
Data source
Reference
- Reference Type:
- publication
- Title:
- Bioavailability of sediment-sorbed and aqueous surfactants to Chironomus riparius (midge).
- Author:
- Pittinger, C.A., Woltering, D.M., and Masters, J.A.
- Year:
- 1 989
- Bibliographic source:
- Environ. Toxicol. Chem. 8:1023-1033.
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Tests were conducted as an aqueous fraction in the presence of sediment.
- GLP compliance:
- not specified
Test material
- Reference substance name:
- Benzenesulfonic acid, C10-13-alkyl derivs., sodium salts
- EC Number:
- 270-115-0
- EC Name:
- Benzenesulfonic acid, C10-13-alkyl derivs., sodium salts
- Cas Number:
- 68411-30-3
- Molecular formula:
- C16-19 H25-31 Na O3 S
- IUPAC Name:
- sodium 4-undecylbenzenesulfonate
- Details on test material:
- C11.8 LAS; 30.4% activity; mean molecular weight = 346
Constituent 1
Sampling and analysis
- Analytical monitoring:
- yes
Test solutions
- Vehicle:
- not specified
- Details on test solutions:
- Natural stream sediments (71% clay, 19% fine silt, 4% medium sand, 6% fine sand) were collected from a pristine site in Rapid Creek, SD. Before testing, wet sediment was autoclaved for 40-60 minutes to reduce microbial populations and minimize initial rates of surfactant biodegradation.
Test organisms
- Test organisms (species):
- other: Chironomus riparius
Study design
- Test type:
- other: flow-through closed system
- Water media type:
- not specified
- Limit test:
- no
- Total exposure duration:
- 24 h
- Remarks on exposure duration:
- average
Test conditions
- Hardness:
- "monitored frequently"
- Test temperature:
- "monitored frequently"
- pH:
- "monitored frequently"
- Dissolved oxygen:
- "monitored frequently"
- Nominal and measured concentrations:
- Test concentrations were control, 8, 42, 146, 319, and 993 ppm.
- Details on test conditions:
- LAS was added to a sediment slurry at a nominal concentration and stirred overnight, then 350 g was poured into each test chamber and allowed to settle. The organic carbon content of the test sediment was 4.2% prior to testing. A flow-through diluter system delivered test material in water to glass containers with 120-140 cm² bottom surface area each. Intact egg masses were incubated in Petri dishes containing 20-30 mL of dilution water at 22 °C until hatching commenced. Newly hatched larvae were allowed to mature 72 hours before testing. Twenty larvae were randomly distributed to each duplicate test chamber for each of five test concentrations plus the controls. Larvae were fed daily until emergence of the first adult in each chamber. Tests were continued until each midge emerged as an adult or larvae were determined to be dead.
- Reference substance (positive control):
- yes
Results and discussion
Effect concentrationsopen allclose all
- Key result
- Dose descriptor:
- NOEC
- Effect conc.:
- 319 other: ppm in sediment
- Basis for effect:
- other: emergence
- Dose descriptor:
- LOEC
- Effect conc.:
- 993 other: ppm in sediment
- Basis for effect:
- other: emergence
- Details on results:
- Adults typically emerged 12-14 days after hatching. Control values for adult emergence were similar to or exceeded the historical average observed in their laboratory (>90%). Percent emergence was 98, 95, 90, 90, 90, and 73 for the control, 8, 42, 146, 319, and 993 ppm concentrations, respectively. For comparison, additional flow-through studies were conducted without sediment.
Any other information on results incl. tables
Results indicate that sorption onto sediment significantly mitigates LAS bioavailability.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Conclusions:
- The NOEC for Chironomus riparius in sediment was 319 ppm, and the LOEC was 993 ppm based on emergence.
- Executive summary:
LAS was added to a sediment slurry at a nominal concentration and stirred overnight, then 350 g was poured into each test chamber and allowed to settle. The organic carbon content of the test sediment was 4.2% prior to testing. A flow-through diluter system delivered test material in water to glass containers with 120-140 cm² bottom surface area each. Intact egg masses were incubated in Petri dishes containing 20-30 mL of dilution water at 22 °C until hatching commenced. Newly hatched larvae were allowed to mature 72 hours before testing. Twenty larvae were randomly distributed to each duplicate test chamber for each of five test concentrations plus the controls. Larvae were fed daily until emergence of the first adult in each chamber. Tests were continued until each midge emerged as an adult or larvae were determined to be dead.
Adults typically emerged 12-14 days after hatching. Control values for adult emergence were similar to or exceeded the historical average observed in their laboratory (>90%). Percent emergence was 98, 95, 90, 90, 90, and 73 for the control, 8, 42, 146, 319, and 993 ppm concentrations, respectively. For comparison, additional flow-through studies were conducted without sediment.
The NOEC for Chironomus riparius in sediment was 319 ppm, and the LOEC was 993 ppm based on emergence.
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