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EC number: 700-881-8 | CAS number: 83145-78-2
- 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
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2004-10-25 to 2004-10-07
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 004
- Report date:
- 2004
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.4-E (Determination of the "Ready" Biodegradability - Closed Bottle Test)
- Version / remarks:
- . EEC directive 92/69, Part C; Publication No. L383, December 1992
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 D (Ready Biodegradability: Closed Bottle Test)
- Version / remarks:
- , adopted 1992-07-17
- Deviations:
- no
- GLP compliance:
- yes
Test material
- Reference substance name:
- 244761-29-3
- EC Number:
- 607-383-9
- Cas Number:
- 244761-29-3
- IUPAC Name:
- 244761-29-3
- Reference substance name:
- Lithium bis(oxalato)borate
- EC Number:
- 456-990-3
- EC Name:
- Lithium bis(oxalato)borate
- IUPAC Name:
- lithium bis(oxalato)borate
- Test material form:
- solid: particulate/powder
- Remarks:
- migrated information: powder
- Details on test material:
- SMILES: O=C1O[B-]2(OC1=O)OC(=O)C(=O)O2.[Li+]
Constituent 1
Constituent 2
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- sewage, predominantly domestic (adaptation not specified)
- Duration of test (contact time):
- 28 d
Initial test substance concentrationopen allclose all
- Initial conc.:
- 10 mg/L
- Based on:
- other: nominal concentration of the test item
- Initial conc.:
- 30 mg/L
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- O2 consumption
- Details on study design:
- TEST CONDITIONS
- Composition of medium: Mineral Medium (8.5 mg/L KH2PO4, 21.75 mg/L K2HPO4, 67.20 mg/L Na2HPO4*12 H2O, 0.5 mg/L NH4Cl, 22.5 mg/L MgSO4*7 H2O, 36.4 mg/L CaCl2*2 H2O, 0.25 FeCl3*6 H2O)
- Additional substrate: no
- Test temperature: 21.1 - 22.9 °C
- pH: 7.3-7.6
- pH adjusted: yes, with 1 N NaOH
- Continuous darkness: yes
TEST SYSTEM
- Culturing apparatus: 250-300 ml BOD bottles with glass stoppers
- Number of culture flasks/concentration: duplicates
- Method used to create aerobic conditions: The concentration of dissolved oxygen was measured for control purposes. The mineral medium was left at
test temperature to obtain a saturated solution at the start of the test.
- Measuring equipment: oxygen meter
SAMPLING
- Sampling frequency: ln duplicate; immediately at the start of the experiment (day 0), and at day 4, 8, 12, 16, 20, 24 and 28
CONTROL AND BLANK SYSTEM
- Inoculum blank: yes
- Abiotic sterile control: yes
- Toxicity control: yes
- Other: positive control: yes: Sodium acetate (2 mg/L)
Reference substance
- Reference substance:
- acetic acid, sodium salt
Results and discussion
% Degradationopen allclose all
- Parameter:
- % degradation (O2 consumption)
- Value:
- 39
- Sampling time:
- 4 d
- Parameter:
- % degradation (O2 consumption)
- Value:
- 89
- Sampling time:
- 8 d
- Parameter:
- % degradation (O2 consumption)
- Value:
- 80
- Sampling time:
- 12 d
- Parameter:
- % degradation (O2 consumption)
- Value:
- 83
- Sampling time:
- 16 d
- Parameter:
- % degradation (O2 consumption)
- Value:
- 95
- Sampling time:
- 28 d
- Details on results:
- The results indicated above refer to 10 mg/L and are mean values from duplicates.
Additional results - that could not be filled in the table above - are as follows: 85 % at day 20 and 89 % at day 24.
The following results refer to 30 mg/L and are mean values: 15 % (4d), 68 % (8d), 77 % (12d), 79 % (16d), 72 % (20d), 82 % (24d), 86 % (28d).
The values of the oxygen depletion (mg BOD/L) (duplicates) at different time points are as follows:
10 mg/L: 0.720 and 0.570 (4 h), 1.400 and 1.530 (8 h), 1.305 and 1.325 (12 h), 1.370 and 1.380 (16 h), 1.460 and 1.330 (20 h), 1.440 and 1.500 (24 h), 1.510 and 1.620 (28 h);
30 mg/L: 1.580 and -0.080 (4 h), 3.480 and 3.290 (8 h), 3.845 and 3.785 (12 h), 3.980 and 3.870 (16 h), 3.500 and 3.600 (20 h), 4.120 and 4.040 (24 h), 4.200 and 4.330 (28 h).
BOD5 / COD results
- Results with reference substance:
- The following results refer to 2 mg/L reference substance and are mean values: 44 % (4d), 93 % (8d), 79 % (12d), 79 % (16d), 73 % (20d), 75 % (24d), 84 % (28d)
Any other information on results incl. tables
There was no inhibition of microbial activity in the toxicity control.
There was no significant degradation in the abiotic control.
Read across for evaluation of biodegradation of potassium bis(oxalato)borate from the biodegradation study results of lithium bis(oxalato)borate is justified on the basis of structural similarity of the substances. The bis(oxalato)borate salt part [B(C2O4)2] is the same in both substances and only the cationic part of salts differ (lithium or potassium). Both lithium and potassium belong to alkali-metals.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
- Conclusions:
- Lithium bis(oxalato)borate was ready biodegradable under the conditions in the closed bottle test and therefore considered to be "ready biodegradable".Based on structural similarity, the result can be used for read across when evaluating biodegradability of potassium bis(oxalato)borate. The result from biodegradation study can be used and is valid for environmental classification of KBOB. For risk assessment, also potassium bis(oxalato)borate can be regarded as readily biodegradable. See also attachment in section 13 (Analogue approach justification).
- Executive summary:
A study on biodegradation (closed bottle test) of lithium bis(oxalato)borate was assessed according to OECD guideline 301D and EU method C.4. The relative biodegradation values calculated from the 2 measurements performed during the test period of 28 days revealed 95 % degradation of test substance at 10 mg/L and 86 % degradation of test substance at 30 mg/L. Furthermore, at least 60 % degradation was reached within the 10 days immediately following the attainment of 10 % biodegradation (10-day window). Except for a deviating difference of duplicate values of the reference substance at the end of the test (24 %), which was considered not to have affected the integrity of this study, all criteria for acceptability of the test were met. Therefore, this study was considered to be valid.
Thus, lithium bis(oxalato)borate was ready biodegradable under the conditions in the closed bottle test. (NOTOX, 2004).
Based on structural similarity, the result can be used for read across when evaluating biodegradability of potassium bis(oxalato)borate. Consequently, also potassium bis(oxalato)borate can be regarded as readily biodegradable.
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