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EC number: - | CAS number: -
- 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
Adsorption / desorption
Administrative data
Link to relevant study record(s)
- Endpoint:
- adsorption / desorption: screening
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- the study does not need to be conducted because the physicochemical properties of the substance indicate that it can be expected to have a low potential for adsorption
- Justification for type of information:
Analytical Limitations for the Determination of Adsorption-Desorption Potential of KDLNO in Soils (Please see the attached justification).
The test substance lithium nickel potassium oxide (KDLNO) has a maximum content of 0.8% lithium, 5.5% potassium, and 66% nickel, the remainder is oxygen and water.
Nickel was chosen as the target analyte for a recent water solubility study, due to its relatively high concentration in KDLNO and analytical sensitivity compared with lithium and potassium. A limit of detection (LOD) for nickel of 1 ppb was achieved using an inductively coupled mass spectrometry (ICP-MS) method. This LOD is approaching the technical sensitivity limit for ICP-MS and is more than sufficient for physical/chemical properties testing. The water solubility of KDLNO was determined, according to EC Method A.6 and OECD Guideline 105, to be less than 1.7 ppb based on a lack of detector response for nickel at the LOD of 1 ppb for a sample containing 59% nickel.
Due to their lower concentrations in the KDLNO test sample, LODs for lithium and potassium would have to be 0.009 ppb and 0.08 ppb, respectively, to quantify total KDLNO at the same level of sensitivity. LODs this low are typically impracticable to achieve using even the most sophisticated analytical equipment available.
The concentration of each constituent released into water (e.g., lithium, nickel, or potassium ions) must be less than the overall water solubility of KDLNO (i.e., less than 1.7 ppb) and is expected to be proportional to the constituent’s weight percent in the KDLNO product. Estimates for the concentrations of metal ion constituents possibly released into water from KDLNO are provided below.
The shake-flask and screening methods to determine the partition coefficient of a substance in accordance with EC Method A.8 and OECD Guidelines 107 and 117 were not considered appropriate for KDLNO.1 Estimation of the partition coefficient of KDLNO by calculation of the ratio of solubilities in n-octanol and water was not feasible as the solubility in both n-octanol and water was below the established limits of detection.
Based on its physical chemical properties, KDLNO is expected to have a low potential for adsorption in soil—it will neither partition to the soil phase nor aqueous phase, but simply remain a solid metal oxide in the undissolved compartment. Determination of the adsorption and desorption behavior of KDLNO in soils using a batch equilibrium method (OECD Guideline 106) or an alternative estimation method (OECD Guideline 121 or Quantitative Structure Activity Relationship (QSAR)), is technically infeasible due to the extremely low water solubility of this inorganic substance (less than 1.7 ppb) and the lack of test methods capable of measuring transportation, adsorption or desorption of KDLNO in the test system.
References:
1. Covance CRS Research Limited. (2019) Lithium nickel potassium oxide (KDLNO): Determination of General Physico-Chemical Properties. Unpublished report. Issue Date 29 October 2019.
2. [Weight percent in KDLNO] ÷ [100%] × [1.7 ppb] = [Concentration in water]
Reference
Description of key information
Key value for chemical safety assessment
- Koc at 20 °C:
- 4
Additional information
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