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EC number: 231-095-9 | CAS number: 7439-88-5
- 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
Auto flammability
Administrative data
Link to relevant study record(s)
- Endpoint:
- relative self-ignition temperature (solids)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP compliant, guideline study, available as unpublished report, acceptable without restrictions
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- other: EC No 1272/2008 using modified N.4 (Self Heating Substances) of the United Nations Recommendations on the Transport of Danergous Goods, Manual of Tests and Criteria, fifth revised edition 2009
- Deviations:
- yes
- Remarks:
- the test item was only available in very limited amounts and was extremely expensive. Therefore, in order to obtain as much information as possible on the self heating properties of the test item a modified procedure was employed
- Principles of method if other than guideline:
- An aliquot of the test item was suspended in a stainless steel mesh cube (approximately 25 x 25 x 25 mm) in an oven. A thermocouple was placed in the centre of the sample and another in the oven. The oven was heated to 140°C and held at this temperature for a period of 24 hours. The temperature of the oven and the sample were continuously monitored over the 24 hour period. After this period the oven temperature was increased from 140 to 400°C at a rate of 30°C/hour. The temperature of the oven and the sample were continuously monitored throughout.
- GLP compliance:
- yes (incl. QA statement)
- Relative self-ignition temperature:
- > 400 °C
- Remarks on result:
- other: Standard pressure assumed. There were no signs of self-ignition or self-heating over the duration of the test.
- Remarks:
- at atm. press. of 101.3 kPa
- Conclusions:
- Iridium (solid only) showed no signs of self-ignition or self-heating over the duration of the test.
- Executive summary:
This is a GLP compliant, guideline study considered suitable for use as the key study for this endpoint. Iridium (solid only) showed no signs of self-ignition or self heating over the duration of the test.
- Endpoint:
- relative self-ignition temperature (solids)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP compliant, guideline study, available as unpublished report, acceptable without restrictions
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- other: EC No 1272/2008 using modified N.4 (Self Heating Substances) of the United Nations Recommendations on the Transport of Danergous Goods, Manual of Tests and Criteria, fifth revised edition 2009
- Deviations:
- yes
- Remarks:
- the test item was only available in very limited amounts and was extremely expensive. Therefore, in order to obtain as much information as possible on the self heating properties of the test item a modified procedure was employed
- Principles of method if other than guideline:
- An aliquot of the test item was suspended in a stainless steel mesh cube (approximately 25 x 25 x 25 mm) in an oven. A thermocouple was placed in the centre of the sample and another in the oven. The oven was heated to 140°C and held at this temperature for a period of 24 hours. The temperature of the oven and the sample were continuously monitored over the 24 hour period. After this period the oven temperature was increased from 140 to 400°C at a rate of 30°C/hour. The temperature of the oven and the sample were continuously monitored throughout. Failure of the chart recorder at a sample temperature of 365°C led to no data being collected above that temperature. However, it was considered that the data collected, i.e. up to a sample temperature of 365°C, was sufficient for the basic requirements of the (modified) test.
- GLP compliance:
- yes (incl. QA statement)
- Relative self-ignition temperature:
- > 365 °C
- Remarks on result:
- other: Standard pressure assumed. Iridium (black) showed no signs of self-ignition or self-heating when held at 140°C for 24 hours. When heated from 140 to 365°C, the sample temperature did not exceed the oven temperature by >60°C.
- Remarks:
- at atm. press. of 101.3 kPa
- Conclusions:
- Iridium (black) showed no signs of self-ignition or self-heating when the test item was held at 140°C for 24 hours. Additionally, when the test item was heated from 140 to 365°C, the sample temperature did not exceed the oven temperature by great than 60°C
- Executive summary:
This is a GLP compliant, guideline study considered suitable for use as the key study for this endpoint. Iridium (black) showed no signs of self-ignition or self-heating when the test item was held at 140°C for 24 hours. Additionally, when the test item was heated from 140 to 365°C, the sample temperature did not exceed the oven temperature by great than 60°C.
Referenceopen allclose all
Description of key information
No signs of self-ignition or self-heating over the duration of the test were observed for iridium or iridium black.
Key value for chemical safety assessment
Additional information
Iridium showed no signs of self-ignition or self-heating over the duration of the test (Harlan 2011a). Iridium (black) showed no signs of self-ignition or self-heating when the test item was held at 140°C for 24 hours (Harlan 2011b). Additionally, when the test item was heated from 140 to 365°C, the sample temperature did not exceed the oven temperature by greater than 60°C. Both studies follow a modified N4 guideline, adapted to use a smaller amount of sample, and are GLP-compliant. They are considered suitable for use as the key studies for this endpoint.
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