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EC number: 231-727-3 | CAS number: 7704-99-6
- 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

Particle size distribution (Granulometry)
Administrative data
Link to relevant study record(s)
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Remarks:
- Internal data using Laser diffraction
- Adequacy of study:
- key study
- Study period:
- Standard Internal measurement
- Reliability:
- 1 (reliable without restriction)
- Qualifier:
- according to guideline
- Guideline:
- other: Determination of Particle Size Distribution Using Laser Diffraction
- Version / remarks:
- Methodology developed according to the expertise of Albemarle Germany
- Deviations:
- not applicable
- Principles of method if other than guideline:
- Method 1 - Laser diffraction
- Basic principle:
This method of measurement is based on the interaction between light beams and solid particles. Under the assumption of spherical particles, a laser diffraction pattern can be used to deduce the particle size distribution within a sample.
- Apparatus:
Cilas granulometer
Measuring range: 0.04-2500 μm
- Procedure:
The sample is suspended in a suitable liquid, if necessary, under the addition of a dispersion agent. The suspension is homogenized by stirring and treatment with ultrasound and subsequently pumped through a cuvette. The cuvette is simultaneously radiated by a helium-neon-laser. The light diffraction pattern resulting from the interaction of laser beam and solid particles is detected by a photomultiplier and converted into a particle size distribution by a processor unit. - GLP compliance:
- no
- Type of method:
- Laser scattering/diffraction
- Type of particle tested:
- primary particle
- Specific details on test material used for the study:
- Different grades (S, PS, G and F) of Zirconium hydride are produced:
- Grade S: Min 99.9/ < 45 µm by seiving/ Average particle size (APS) according to Blaine: 2.6 +/- 1.6 µm
- Grade PS: Min 99.9/ < 36 µm by seiving/ Average particle size (APS) according to Blaine: 2.0-3.0 µm
- Grade G: Min 99.9/ < 36 µm by seiving/ Average particle size (APS) according to Blaine: 5.5 +/- 1 µm
- Grade F: Min 99.9/ < 45 µm by seiving/ Average particle size (APS) according to Blaine: 2.3 +/-0.5 µm
Granulometry using laser Diffraction are provided for Grade PS, only. - Mass median aerodynamic diameter:
- > 2 - < 3 µm
- Remarks on result:
- other: obtained by performing Blaine's method
- Key result
- Percentile:
- D50
- Mean:
- ca. 3.412 µm
- Remarks on result:
- other: ZrH2 grade PS
- Percentile:
- D90
- Mean:
- ca. 8.33 µm
- Remarks on result:
- other: ZrH2 grade PS
- Percentile:
- other: D100
- Mean:
- ca. 19.29 µm
- Remarks on result:
- other: ZrH2 grade PS
- Conclusions:
- The granulometry of ZrH2 (grade PS) has been determined using Laser diffraction method (Internal methodology). D50, D90 and D100 were determined according this method and the results were 3.412 µm, 8.33 µm and 19.29 µm respectively.
Reference
Different grades (S, PS, G and F) of Zirconium hydride is produced. Grain size for ZrH2 grades S, G and F is < 45 µm (99.9%) by seiving. Grade PS is < 36 µm (99.9%). Blaine's methods which determines the surface area of powders and deduces the average grain diameter found that grades S, PS and F where between 2.0-3.0 and grade G: 5.5 µm average.
Description of key information
The granulometry of ZrH2 (grade PS) has been determined using Laser diffraction method (Internal methodology). D50, D90 and D100 were determined according this method and the results were 3.412 µm, 8.33 µm and 19.29 µm respectively.
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