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EC number: 257-098-5 | CAS number: 51274-00-1 This substance is identified in the Colour Index by Colour Index Constitution Number, C.I. 77492.
- 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
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Test procedure in accordance with generally accepted scientific standards and described in sufficient detail
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions)
- Principles of method if other than guideline:
- The particle size distribution was determined by Image Analysis in accordance with the Council Regulation (EC JRC73260, nanomaterial). The test method is in all essential part identical with the OECD Guideline, Test no. 110, method B.
The pigment was dispersed in about 10 ml of distilled water by means of ultrasound for 1min with the power of 100W. Thus, agglomerates are destroyed forming single or aggregated particles. The particles are placed on a TEM grid and tested by high resolution scanning transmission electron microscopy (HR STEM Company: FEI, QS- No.: 02464; SOP 00013 Vers.2; Reference Material: UER3 922.00). - GLP compliance:
- no
- Type of method:
- microscopic examination
- Type of distribution:
- counted distribution
- Percentile:
- D50
- Mean:
- 82 - < 184 nm
- Remarks on result:
- other: minimal and maximal median diameters measured with Feret method(migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.)
- Percentile:
- other: 62%
- Mean:
- > 1 - < 100 other: nm
- St. dev.:
- 4.4
- Remarks on result:
- other: The quantity of 62 ± 4.4% of all particles based on minimum external dimensions (Q0 Feret min) are between 1 nm and 100 nm.
- Conclusions:
- 62 +/- 4.4 % of all particles of the measured test material iron hydroxide oxide yellow based on the external dimensions are between 1 nm and 100 nm. Iron hydroxide oxide yellow is a nanomaterial.
- Executive summary:
According to the EU definition iron hydroxide oxide yellow is a nanomaterial. The needles are in one direction (minimum) within the specification for nanomaterials. For sample evaluation the external diameter considering (Feret measurements) is chosen due to the shape of the particles. Iron hydroxide oxide yellow shows a rod shape. Therefore the evaluation considering the equivalent circle diameter is inappropriate.
Definition:
“Nanomaterial means a natural, incidental or manufactured material containing particles, in an unbound state or as an aggregate or as an agglomerate and where, for 50% or more of the particles in the number size distribution, one or more external dimensions is in the size range 1nm – 100nm.”
Reference
Statistical Data
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Description of key information
The test material iron hydroxide oxide yellow is considered as a nanomaterial, as 62 +/- 4.4 % of all particles of the test material based on the external dimensions are between 1 nm and 100 nm.
Additional information
Iron hydroxide oxide yellow grades are nanomaterials, according to the EU recommendation of the definition of a nanomaterial 2011/696/EU, Official Journal of the European Union. The rods are in one direction (minimum) within the specification for nanomaterials. For sample evaluation the external diameter (Ferret measurements) is chosen due to the shape of the particles. Iron hydroxide oxide yellow shows a rod shape. Therefore the evaluation considering the equivalent circle diameter is inappropriate. The particle size distribution was determined by Image Analysis in accordance with the Council Regulation (EC JRC73260, nanomaterial). The test method is in all essential parts identical with the OECD Guideline, Test no. 110, method B.
Definition:
“Nanomaterial means a natural, incidental or manufactured material containing particles, in an unbound state or as an aggregate or as an agglomerate and where, for 50% or more of the particles in the number size distribution, one or more external dimensions is in the size range 1nm – 100nm.”
Iron Oxide containing catalysts are generally formed as shaped solids rather than powders. Granulometry data for catalyst products is therefore considered to be a measure of the propensity of a catalyst to produce fines in the course of transportation, handling and use. Test data for catalysts is based on Particle Size Distribution analysis of fines produced in the ASTM D4058 - 96(2011)e1 Standard Test Method for Attrition and Abrasion of Catalysts and Catalyst Carriers. These fines do not typically fall into the definition of nanomaterials according to Commission recommendation 2011/696/EU.
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