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EC number: 290-649-8 | CAS number: 90194-39-1
- 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
Sediment toxicity
Administrative data
Link to relevant study record(s)
Description of key information
The 28-day NOEC for Lumbriculus variegatus was 81 mg LAS Na/kg sediment dw.
Key value for chemical safety assessment
- EC10, LC10 or NOEC for freshwater sediment:
- 81 mg/kg sediment dw
Additional information
No experimental data on sediment toxicity are available for the test item. However, experimental data for source substance 2 are available and a read-across approach is applied. Please refer to read-across justification document attached in IUCLID Section 13. Furthermore, only key studies are taken into account here. For further supporting information please refer to respective REACH registration dossier of the source substance.
LAS Na (CAS 68411 -30 -3)
Toxicity to sediment dwelling organisms was investigated with linear alkylbenzene sulfonate (Comber et al., 2006). Samples of natural sediment were spiked with test substance at concentrations of 50, 75, 100, 150, 300, and 600 mg/kg/dry weight. 10 test organisms of species Lumbriculus variegatus were then added. Exposure lasted 28 days, at which time the organisms were observed for survival and biomass. The test substance half-life in aerobic sediment was approximately 20 days. The EC50 was >= 105 mg/kg sediment dw. The 28-day NOEC was 81 mg/kg sediment dw.
A sediment toxicity test of LAS (linear alkylbenzene sulfonate) was conducted following the OECD 218 guideline, using the midge Chironomus riparius (Pittinger, 1989). All results are based on the measured concentration of the test substance. The LAS had an average alkyl chainlength of 11.9, and was comprised of C10 -C14 alkyl chains.
In an egg hatchability semi-static assay (acute test), midge eggs were exposed to a range of LAS concentrations in water and were monitored for hatching success and posthatch survival (Pittinger, 1996). No significant reduction in egg hatching was observed at the highest concentration tested (18.9 mg/L). However, significant reduction in the survival of the newly hatched larvae occurred at 4.7 mg/L. The 72h LC50 was between 1.0 and 4.7 mg/L, based on survival of newly hatched larvae.
In the partial life cycle bioassay in a flow-through sediment/water test system (chronic test), percentages of winged adults emerging after continuous exposure of larvae and pupae to a range of LAS concentrations were determined (van de Plassche et al., 1999). Exposure concentrations in sediment, interstitial water and overlying water were monitored by 14C liquid scintillation counting. The effect of LAS level in the water column was determined in a total of 6 chronic toxicity tests. The NOECs from these tests were 2.4 -3.0 (without sediment), and 3.0 -6.0 (with sediment). The effect of LAS on Chironomus was also evaluated in an experiment using sediment spiked with LAS. In this test, the NOEC of sediment-spiked LAS was 319 mg/kg sediment (dry weight basis). The normalized NOEC is 2.87 mg/L for C11.6 LAS (van de Plassche et al., 1999).
Toxicity to sediment dwelling organisms was investigated with linear alkylbenzene sulfonate (LAS). Samples of natural sediment were spiked with concentrations of 10, 50, 100, 200, 300, 400, 500, 750 and 1000 mg/kg dw mg/kg dw and controls (Comber et al. 2006). 10 test organisms of species Caenorhabditis elegans were then added. Exposure lasted 3 days, at which time the organisms were observed for survival and reproduction. The EC10 was 275 mg/kg sediment dw based on growth rate.
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