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EC number: 283-815-6 | CAS number: 84731-55-5
- 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 microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
The activated sludge respiration inhibition test does not need to be conducted as the substance is readily biodegradable at the range of concentrations that can be expected in the influent of a sewage treatment plant.
Key value for chemical safety assessment
Additional information
Lithium isooctadecanoate is considered to be readily biodegradable based on data read across from lithium 12 -hydroxystearate and isooctadecanoic acid, and therefore no testing on the toxicity to microorganisms has been conducted. A ready biodegradation study on lithium isooctadecanoate is currently ongoing to confirm this conclusion and, when available, the results of the toxicity control will be used as supporting evidence for waiving the toxicity to micro-organisms endpoint.
The lack of toxicity to micro-organisms is supported by data on other lithium salts of monocarboxylic acids. The toxicity of lithium behenate (EC 224 -801 -1, lithium salt of C22 straight chain) to aquatic micro-organisms was taken from the inhibition control of a GLP-compliant ready biodegradability test following OECD guideline 301B (Harlan 2013). 39.6 mg of lithium behenate was dispersed in 400 mL mineral medium by high shear mixing (approximately 7500 rpm) for 15 minutes and 51.4 mL sodium benzoate stock solution were added to mineral medium inoculated with 30 mg/L suspended solids mixed population of activated sewage sludge and adjusted to 3 L, giving a final concentration of 13.2 mg/L lithium behenate and 17.1 mg/L sodium benzoate. The test vessels were sealed, the evolved carbon dioxide collected and samples from the carbon dioxide absorber vessels analysed on days 0, 2, 6, 8, 10, 14, 21, 28 and 29 for calculation of the percentage degradation. This toxicity control vessel attained 74 % degradation after 14 days and 83 % degradation over 28 days, which are above the 25 % required for substances to be considered as non-inhibitory, thereby confirming that lithium behenate was not toxic to sewage treatment micro-organisms used in the test.
Although data relate to lithium behenate (lithium salt of C22 fatty acid), lithium isooctadecanoate is expected not to be inhibitory to micro-organisms either as it is considered to be readily biodegradable with no toxicity to Daphnia or algae at up to 100 mg/L. Data on lithium salts of monocarboxylic acids C14 -C22 indicate similarities in environmental fate and ecotoxicity properties across the substances with different chain lengths, with and without unsaturated double bonds and/or hydroxyl groups, and these similarities would be expected for lithium isooctadecanoate as well, varying as it does from the substances in the category by the presence of a single methyl branch on the carbon chain.
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