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EC number: 452-330-3 | 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
Particle size distribution (Granulometry)
Administrative data
Link to relevant study record(s)
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 29 July 2003 to 30 July 2003
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: The study was reported to a high standard with a good level of detail in the methodology and results. The experimental portion of the study was performed in line with good scientific principles.
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- A vertical elutriator was set up containing approximately 30 g of dried test material. The amount of test substance eluted from the starting material at a range of air velocities (corresponding to an appropriate range of settling velocities and hence aerodynamic equivalent diameters (AED)), was measured on duplicate samples, allowing 30 minutes elutriation at each velocity.
- GLP compliance:
- yes
- Type of method:
- sedimentation (gravitational settling)
- Type of particle tested:
- primary particle
- Type of distribution:
- other: Aerodynamic equivalent diameters
- No.:
- #1
- Size:
- <= 115 µm
- Distribution:
- ca. 13.2 %
- No.:
- #2
- Size:
- <= 15 µm
- Distribution:
- ca. 0 %
- Conclusions:
- Under the conditions of the test, it was apparent that some of the test material was capable of becoming airborne; 13.2% being less that or equal to 115 µm aerodynamic equivalent diameter (AED). No material eluted with an AED of <15 µm. Based on the the UK and ISO definitions (AED <100 µm inhalable and <15 µm respirable) the test material is considered to be of low inhalability and none of the sample is respirable. The study is considered to be reliable, relevant and adequate for risk assessment purposes.
- Executive summary:
The particle size distribution of the test material was determined by air elutriation. A vertical elutriator was set up containing approximately 30 g of dried test material. The amount of test material eluted from the starting material at a range of air velocities (corresponding to an appropriate range of settling velocities and hence aerodynamic equivalent diameters (AED)), was measured on duplicate samples, allowing 30 minutes elutriation at each velocity.
Under the conditions of the test, it was apparent that some of the test substance was capable of becoming airborne; 13.2% being less that or equal to 115 µm aerodynamic equivalent diameter (AED). No test material eluted with an AED of <15 µm. Based on the the UK and ISO definitions (AED <100 µm inhalable and <15 µm respirable) the test material is considered to be of low inhalability and none of the sample is respirable.
Reference
Table 2: Results
AED* (µm) |
Weight loss (%) |
Mean weight loss (%) |
Mean cumulative loss (%) |
|
Sample 1 |
Sample 2 |
|||
≤15 |
0.00 |
0.00 |
0.00 |
0.00 |
≤35 |
0.89 |
1.36 |
1.12 |
1.12 |
≤50 |
1.84 |
2.35 |
2.09 |
3.22 |
≤75 |
2.53 |
4.13 |
3.33 |
6.55 |
≤115 |
6.50 |
6.65 |
6.58 |
13.12 |
* This represents the aerodynamic cut points of the various elutriator velocities employed.
From these data it was determined that 13.12 % of the test substance was of AED≤115 µm (AED≤100 µm classified as inhalable according to current UK and ISO definitions, HSE, 2000; ISO, 1995). Of this inhalable percentage, none (0.00 %) is considered as respirable i.e. <15 µm AED.
Description of key information
Aerodynamic Equivalent Diameters (AED), 13.2% ≤115 µm aerodynamic equivalent diameter (AED). No material eluted with an AED of <15 µm, Air Elutriation, Rattray 2003
Additional information
The particle size distribution of the test substance was assessed by vertical elutriation in Rattray (2003). A vertical elutriator was set up containing approximately 30 g of dried test material. The amount of test material eluted from the starting material at a range of air velocities (corresponding to an appropriate range of settling velocities and hence aerodynamic equivalent diameters (AED), was measured on duplicate samples, allowing 30 minutes elutriation at each velocity. Under the conditions of the test, it was apparent that some of the test substance was capable of becoming airborne; 13.2% being less than or equal to 115 µm aerodynamic equivalent diameter (AED). No material eluted with an AED of <15 µm. Based on the UK and ISO definitions (AED <100 µm inhalable and <15 µm respirable) the test material is considered to be of low inhalability and none of the sample is respirable. This study was assigned as the key study as it accurately measures the aerodynamic equivalent diameter and allows assessment of the potential inhalation hazard that could arise from the test substance.
Supporting information was available in the form of Füldner 2003, a study investigating the particle size of the test material was determined using the method of light diffraction (Fraunhofer diffraction method). Under the conditions of the test, the median size distribution of the particles was determined to be 103.31 µm. The particles were qualitatively reported to be irregularly shaped.
Both studies were performed in compliance with GLP and were reported to a high standard. Although neither study was performed to a standardised guideline, both methods were designed in line with good scientific principles. Both studies were therefore assigned a reliability score of 2, and considered suitable and adequate for assessment.
The available data is considered complete. The observations of the aerodynamic equivalent diameters (AED), 13.2% ≤115 µm AED, no material with an AED of <15 µm, and the conclusion, the test material was considered to be of low inhalability and none of the sample was respirable, were taken forward for risk assessment.
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