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EC number: 456-990-3 | CAS number: 244761-29-3 LITHIUM-BIS(OXALATO)BORATE
- 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
Dissociation constant
Administrative data
- Endpoint:
- dissociation constant
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- the study does not need to be conducted because the substance is hydrolytically unstable (half-life less than 12 hours)
Cross-reference
- Reason / purpose for cross-reference:
- data waiving: supporting information
Reference
- Endpoint:
- hydrolysis
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2010-08-11
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP and guideline compliant study.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 111 (Hydrolysis as a Function of pH)
- Version / remarks:
- May 12th 1981
- Deviations:
- yes
- Remarks:
- -
- Principles of method if other than guideline:
- The storage tests could not be carried out in buffer solutions, because all of them contain alkali metal salts. In aqueous solutions of LiBOB and other alkali metal salts a salt metathesis reaction occurs, i.e. precipitates of MBOB-salts (M= Na, K, Rb, Cs) are formed, because such compounds with heavier alkali metals are insoluble in water.
- GLP compliance:
- yes
- Radiolabelling:
- no
- Analytical monitoring:
- not specified
- Buffers:
- The storage tests could not be carried out in buffer solutions, because all of them contain alkali metal salts. In aqueous solutions of LiBOB and other alkali metal salts a salt metathesis reaction occurs, i.e. precipitates of MBOB-salts (M= Na, K, Rb, Cs) are formed, because such compounds with heavier alkali metals are insoluble in water. For this reason the LiBOB hydrolysis experiments were carried out in heavier alkali element-free solutions.
- Details on test conditions:
- 0.01 m solutions of LiBOB were prepared in heavy water and analyzed with 11B-NMR.
- Duration:
- 1 400 min
- Temp.:
- 25 °C
- Initial conc. measured:
- >= 8.7 - <= 9.2 other: mmol/kg
- Duration:
- 220 min
- Temp.:
- 40 °C
- Initial conc. measured:
- >= 7.2 - <= 8.5 other: mmol/kg
- Duration:
- 120 min
- pH:
- 4
- Temp.:
- 60 °C
- Initial conc. measured:
- ca. 4.4 other: mmol/kg
- Duration:
- 35 min
- Temp.:
- 60 °C
- Initial conc. measured:
- >= 5.9 - <= 7.6 other: mmol/kg
- Number of replicates:
- None
- Preliminary study:
- LiBOB is unstable in water and decomposes into two different products: borole and boric acid. Whereas in concentrated solutions (> ca 0.1 m) a mixture of the borole and boric acid is formed, in dilute solutions only boric acid as decomposition product is observed. In the main study a dilute solution was used.
- Transformation products:
- no
- No.:
- #1
- % Recovery:
- 0
- pH:
- 4
- Temp.:
- 25 °C
- Duration:
- 1 400 min
- % Recovery:
- 0
- pH:
- 7
- Temp.:
- 25 °C
- Duration:
- 1 400 min
- % Recovery:
- 0
- pH:
- 9
- Temp.:
- 25 °C
- Duration:
- 1 400 min
- % Recovery:
- 4
- pH:
- 4
- Temp.:
- 40 °C
- Duration:
- 220 min
- % Recovery:
- 4
- pH:
- 7
- Temp.:
- 40 °C
- Duration:
- 220 min
- % Recovery:
- 1.5
- pH:
- 9
- Temp.:
- 40 °C
- Duration:
- 220 min
- % Recovery:
- 0
- pH:
- 4
- Temp.:
- 60 °C
- Duration:
- 120 min
- % Recovery:
- 9.8
- pH:
- 7
- Temp.:
- 60 °C
- Duration:
- 35 min
- % Recovery:
- 11.9
- pH:
- 9
- Temp.:
- 60 °C
- Duration:
- 35 min
- pH:
- 4
- Temp.:
- 25 °C
- DT50:
- ca. 169 min
- St. dev.:
- 0.991
- Type:
- (pseudo-)first order (= half-life)
- pH:
- 7
- Temp.:
- 25 °C
- DT50:
- ca. 182 min
- St. dev.:
- 0.995
- Type:
- (pseudo-)first order (= half-life)
- pH:
- 9
- Temp.:
- 25 °C
- DT50:
- ca. 182 min
- St. dev.:
- 0.993
- Type:
- (pseudo-)first order (= half-life)
- pH:
- 4
- Temp.:
- 40 °C
- DT50:
- ca. 48 min
- St. dev.:
- 0.998
- Type:
- (pseudo-)first order (= half-life)
- pH:
- 7
- Temp.:
- 40 °C
- DT50:
- ca. 48 min
- St. dev.:
- 0.993
- Type:
- (pseudo-)first order (= half-life)
- pH:
- 9
- Temp.:
- 40 °C
- DT50:
- ca. 38 min
- St. dev.:
- 0.986
- Type:
- (pseudo-)first order (= half-life)
- pH:
- 4
- Temp.:
- 60 °C
- DT50:
- ca. 11 min
- St. dev.:
- 0.973
- Type:
- (pseudo-)first order (= half-life)
- pH:
- 7
- Temp.:
- 60 °C
- DT50:
- ca. 12 min
- St. dev.:
- 0.989
- Type:
- (pseudo-)first order (= half-life)
- pH:
- 9
- Temp.:
- 60 °C
- DT50:
- ca. 12 min
- St. dev.:
- 0.993
- Type:
- (pseudo-)first order (= half-life)
- Details on results:
- With increasing temperatures the hydrolysis of LiBOB is accelerated from 169 min at 25 °C to 12 min at 60 °C. The pH does not seem to have an influence on the hydrolysis reaction.
- Validity criteria fulfilled:
- not specified
- Conclusions:
- The hydrolysis of lithium bis(oxalato)borate in different heavier alkali element-free buffer solutions (pH = 4, 7, 9) at different temperatures (T = 25 °C, 40 °C, 60 °C) was investigated using 11B-NMR. Measurements revealed a hydrolysis of LiBOB (half-lives: >12<169 min). The degradation product of the hydrolysis is boric acid (in concentrated solutions borole can also be detected).
- Executive summary:
The hydrolysis of lithium bis(oxalato)borate and the identification of the decomposition product were assessed based on the OECD guideline 111 and the EU method C.7. The hydrolysis of lithium bis(oxalato)borate in different heavier alkali element-free buffer solutions (pH = 4, 7, 9) at different temperatures (T = 25°C, 40°C, 60°C) was investigated using 11B-NMR. The half live of LiBOB decreased with increasing temperature. The pH value does not have an influence on the hydrolysis. The detected degradation product boric acid was identified with 11B-NMR.
The storage tests could not be carried out in the recommended buffer solutions as they are all containing alkali metal salts. In aqueous solutions a salt metathesis reaction occurs among the alkali metal salts leading to BOB-salts of heavier alkali metals. These substances are insoluble in water and precipitate. The kinetics of the hydrolysis of heavier alkali metal BOB salts is very different from that of LiBOB. For this reason other buffer solutions had been used in this study. (Chemetall, 2010)
Data source
Materials and methods
Results and discussion
Applicant's summary and conclusion
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