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Diss Factsheets
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EC number: 934-407-8 | 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
![](https://echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_physical-and-chemical-properties.png)
Particle size distribution (Granulometry)
Administrative data
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 16/04/2015-17/04/2015
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 016
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- ISO 13320 (Particle size analysis - Laser diffraction methods)
- Qualifier:
- according to guideline
- Guideline:
- other: CIPAC MT 187
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
- Principles of method if other than guideline:
- - PRINCIPLE OF TEST:
The test is conducted to determine the particle size distribution of X300 with a laser diffraction particle size analysis. The guidelines were chosen because of the high solubility of the test item in water and presents as agglomerates.
The analysis is conducted initially using a visual microscope and is then undertaken more formally using a Laser Diffraction Particle Size Analyzer. The benefit of this procedure is that it allows the operator to obtain a better understanding of the particle characterization of the material.
The sample is also initially observed to determine whether sieving of the material is required.
A method development for the particle size analysis on the material is then undertaken to obtain the correct parameters for the formal analysis. The method development is employed to identify the most appropriate optical properties for the material, the correct dispersant, dispersion pressures and sample compatibility. Once these parameters are obtained the final sample is then analyzed using the Malvern Mastersizer 2000 Laser Diffraction Analyzer. It is normal practice to complete 5 runs to ensure repeatability of results.
- SHORT DESCRIPTION OF TEST CONDITIONS:
Optical Microscope Analysis:
The sample is observed under 3 conditions.
• Direct observation
• Under a microscope with 100 x magnification
• Under a microscope with 400 x magnification
Preliminary solubility and dispersability assays are also undergone in order to define the best dispersant for the test item:
In order to select a suitable dispersant, a small quantity of sample is added to approximately 25 ml of solvent. The mixture is shaken for 10 seconds and if the sample is seen to be soluble, then the test is repeated using a different solvent. Testing continues until a suitable dispersant is selected. The complete solubility and dispersability test is then performed using this selected dispersant. In some cases the selected dispersant may be found to be unsuitable after the full test has been performed. The preliminary screening test is then repeated until a suitable solvent is attained. Silicone oil dispersant was selected.
During the method development phase of the analysis trials were conducted using both the dry powder module (DPM) and the small volume (wet) module (SVM). The SVM trials were conducted using silicone oil as the dispersant. The results of these trials indicated that the most appropriate test and material parameters to obtain the optimum measurements were:
Module : SVM
Dispersant : Silicon Oil
Dispersion pressure : 2400 rpm
Refractive index (sample) : 0.000 n
Absorption : 0 AU
Analysis Model : General Purpose (Normal)
- Parameters analysed / observed:
During the optical Microscope analysis: The physical characteristics of the material are recorded, noting such items as shape and size distribution.
During the laser diffraction analysis: particule size analysed over the range 0.02 µm to 2000 µm and standard deviation results (d10, d50, d90, d15.78, geometric standard deviation, % standard deviation of the population. - GLP compliance:
- yes
- Type of method:
- Laser scattering/diffraction
- Type of particle tested:
- agglomerate
- Type of distribution:
- volumetric distribution
Test material
- Test material form:
- solid: flakes
Constituent 1
- Specific details on test material used for the study:
- SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material:040801#
FORM AS APPLIED IN THE TEST (if different from that of starting material): the test item is sieved < 1000 μm prior to testing to remove agglomerations
Results and discussion
- Mass median aerodynamic diameter:
- ca. 436.737 µm
- Geometric standard deviation:
- 0.041
- Remarks on result:
- other: standard deviation of the population, or 1.2% (percentage of the standard deviation of the population)
Particle sizeopen allclose all
- Key result
- Percentile:
- D10
- Mean:
- ca. 68.365 µm
- St. dev.:
- 1.184
- Remarks on result:
- other: 1.7% Percentage standard deviation of the population
- Key result
- Percentile:
- D50
- Mean:
- ca. 341.139 µm
- St. dev.:
- 6.757
- Remarks on result:
- other: 2.0% Percentage standard deviation of the population
- Key result
- Percentile:
- D90
- Mean:
- ca. 856.753 µm
- St. dev.:
- 13.873
- Remarks on result:
- other: 1.6% Percentage standard deviation of the population
Applicant's summary and conclusion
- Conclusions:
- Particle Size Analysis using small volume module (SVM) with silicon oil as a dispersant:
Volume weighted mean = 407.774 µm
Median (d.50) = 341.139 µm
Mode = 540.097 µm
MMAD (Mass Median Aerodynamic Diameter) mean = 436.737 µm
10 % of material is < 68.365 µm (average)
50 % of material is < 341.139 µm (average)
90 % of material is < 856.753 µm (average)
by volume of sample was seen to be < 10.00 μm = 1.18% - Executive summary:
The granulometry of the substance which is a powder was determined by the laser diffraction method according to the ISO 13320:2009 and CIPAC MT 187 standards. The tests was run with the small volume module (SVM) using the silicone oil as a dispersant and the results were as follow: Volume weighted mean = 407.774 µm Median (d.50) = 341.139 µm Mode = 540.097 µm MMAD (Mass Median Aerodynamic Diameter) mean = 436.737 µm
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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