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EC number: 701-307-9 | 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
Water solubility
Administrative data
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2010
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 010
- Report date:
- 2010
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.6 (Water Solubility)
- Deviations:
- no
- Type of method:
- flask method
Test material
- Reference substance name:
- boron nitride (cubic)
- EC Number:
- 701-307-9
- Cas Number:
- 10043-11-5
- Molecular formula:
- BN
- IUPAC Name:
- boron nitride (cubic)
- Test material form:
- solid: crystalline
Constituent 1
Results and discussion
Water solubility
- Water solubility:
- < 0.01 mg/L
- Temp.:
- 21 °C
- pH:
- 7.2
- Details on results:
- Preliminary Visual Estimation of the Water SolubilityThe preliminary visual experiments showed that the water solubility of the test item is < 13 mg/L. According to the guidelines the water solubility should be determined with the column elution method in that case. For the column elution method an inert support material (sea sand) is coated with an excess of the test item by dissolving the test item in a volatile solvent. As the test item is an inorganic material insoluble in volatile solvents, it is not possible to dissolve it in such a solvent. Therefore, the column elution method is not applicable for this test item and the water solubility was determined by the "flask method".
Any other information on results incl. tables
Preliminary Visual Estimation of the Water Solubility
Table 1. Appearance of the test mixtures
Amount of the test item (mg) | Total volume (ml) | Appearance of mixture |
97.96 | 0.1 | undissolved |
0.5 | undissolved | |
1 | undissolved1) | |
2 | undissolved1) | |
10 | undissolved1) | |
100 | undissolved1) | |
11.66 | 100 | undissolved2) |
13.30 | 500 | undissolved2) |
12.50 | 1000 | undissolved2) |
1): After adding the amount of water, the solution was treated with ultrasound for 3 min.
2): After adding the amount of water, the solution was first treated with ultrasound for 5 min and afterwards stirred at room temp. for about 24 h.
Flask-Method
Table: substance concentration in the water extracts - experiments A to D
Experiment | A | B | C | D (blank) |
Mean concentration of boron (g/l) (rounded value)1) | 0.010 | 0.013 | 0.008 | <5*10-5 |
Mean concentration of calcium (g/l) (rounded value)2) | 1.3*10-4 | 0.6*10-4 | 1.1*10-4 | |
Mean concentration of Mn and Li (g/l) (rounded value)3) | <2.0*10-5 | <2.0*10-5 | <2.0*10-5 | <2.0*10-5 |
1):
Average experiments A to C: 0.010 g/l
Standard deviation (mean concentration of boron): 0.002 g/l
Relative standard deviation (mean concentration of boron): 22 %
2):
Average experiments A to C (corrected for the blank value): 1.0*10-4 g/l
Standard deviation (mean concentration of calcium, corrected for the blank value): 0.4*10-4 g/l
Relative standard deviation (mean concentration of calcium, without correction for the blank value): 15 %
Relative standard deviation (mean concentration of calcium, corrected for the blank value): 35 %
3): As the measured concentrations of manganese and lithium in the water extracts in the experiments A to C are below the reporting level, the concentration of these analytes in the water extracts is: < 2.0*10-5 g/1.
Applicant's summary and conclusion
- Conclusions:
- The concentration of boron, calcium, lithium and manganese, dissolved in water extracts of the test item at a temperature of 20 °C, was determined to: Boron: 0.008 to 0.013 g/L, Calcium: < 1.3 *10E-4 g/L, Manganese : < 2.0 *10E-5 g/L, Lithium: < 2.0 *10E-5 g/L. Therefore, boron nitride can be considered to be practically insoluble in water.
- Executive summary:
The objective of the present study was to analyse, if water extracts of the test item Synthetic cubic Boron Nitride Grade 2 (2 micron) Powder contain measurable amounts of boron, calcium, lithium and manganese. The method to determine the water solubility according to the OECD test guideline No. 105 and the European Commission Regulation (EC) No.440/2008, 4.6. has been applied. For the determination of water solubility the flask method was applied. As the test item is an inorganic substance, which is not soluble in water, it is not possible to determine the water solubility of the complete test item. Therefore, the concentrations of boron, calcium, lithium and manganese in water extracts of the test item were determined using ICP-OES method to demonstrate that cubic boron nitride is practically insoluble in water.
The concentration of boron, calcium, lithium and manganese, dissolved in water extracts of the test item at a temperature of 20 °C, was determined to:
Boron: 0.008 to 0.013 g/L
Calcium: < 1.3 *10-4 g/L
Manganese : < 2.0 *10-5 g/L
Lithium: < 2.0 *10-5 g/L
The small amount of boron which has been found in the sample extracts most probably results from boron containing impurities of boron nitride. The concentration of boron in the water extracts and thus, the concentration of soluble impurities in boron nitride is very low. Against this background, boron nitride can be regarded as being practically insoluble in water.
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