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Diss Factsheets
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EC number: 231-137-6 | CAS number: 7440-27-9
- 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
Flammability
Administrative data
Link to relevant study record(s)
- Endpoint:
- flammable solids
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2015-09-16
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with generally accepted scientific standards and described in sufficient detail
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- EU Method A.10 (Flammability (Solids))
- Deviations:
- no
- GLP compliance:
- no
- Key result
- Test procedure:
- burning time over 250 mm for metal powders or metal alloys
- Burning time:
- > 300 - < 600 s
- Moisture (wt %):
- 0
- Interpretation of results:
- Category 2 (flammable solids) based on GHS criteria
- Conclusions:
- Under the conditions of the test described, the Rare Earth alloy could be ignited and reacted over the whole length of a sample in less than 10 minutes. The substance has to be classified according to BAM
classification and test methods regualtions as flammable solid, devision 4.1 (packaging group III). For reasons of precaution and safety the packaging group II is assigned. - Executive summary:
Under the conditions of the test described, the Rare Earth alloy could be ignited and reacted over the whole length of a sample in less than 10 minutes. The substance has to be classified according to BAM
classification and test methods regualtions as flammable solid, devision 4.1 (packaging group III). For reasons of precaution and safety the packaging group II is assigned.
Since the flammability depends on the Rare Earth content and the particle size of the alloy, the terbium alloys under consideration should also be classified.
Reference
A glow, but no visible flame, was observed which spread over the powder train. In the first experiment the
glow covered a distance of 8 cm in 6 min 30 sec. After additional 2 cm the glow extinguished after 15 min.
In a second experiment the glow covered a distance of 5 cm and extinguished after 8.
In a third experiment the glow covered a distance of 25 cm in 24 min.
In conclusion the sample could be ignited and the reaction spread over the powder train in more than 5
min and less than 10 min.
The substance has to be classified according to BAM classification and test methods regualtions
as flammable solid, devision 4.1 (packaging group III).
For reasons of precaution and safety the packaging group II is assigned.
Description of key information
Since the self-ignition temperature depends on the overall rare earth content and the particle size of the alloy, a representative alloy VD 687 was tested.
Under the conditions of the test described, the Rare Earth alloy could be ignited and reacted over the whole length of a sample in less than 10 minutes. The substance has to be classified according to BAM
classification and test methods regualtions as flammable solid, devision 4.1 (packaging group III). For reasons of precaution and safety the packaging group II is assigned.
Key value for chemical safety assessment
- Flammability:
- flammable
Additional information
The tested representative Rare Earth alloy VD 687 is not flammable in contact with water. The evolved quantity of gas was
120 ml/kg/h. Therefore no classification in class 4.3 according to BAM classification and test methods
regulation is required.
The tested representative Rare Earth alloy VACODYM VD 687 is a self-heating substance, class 4.2 and the packaging group II is assigned.
Since the self-heating behaviour depends on the Rare Earth content and the particle size of the alloy, the terbium alloys under consideration should also be classified.
Justification for classification or non-classification
Flammability:
A representative Rare Earth alloy was tested.
Under the conditions of the test described, the Rare Earth alloy could be ignited and reacted over the
whole length of a sample in less than 10 minutes. Therefore, the tested alloy has to be classified as flammable solid (
flammable solid 2, H228).
Since the flammability depends on the Rare Earth content and the particle size of the alloy, the terbium alloys under consideration should also be classified.
Elemental Terbium (in alloys) in mixture in a form of powder should therefore be classified as flammable solid (flammable solid 2, H228).
Flammability in contact with water:
A representative Rare Earth alloy was tested.
Under the conditions of the test the alloy (powder form) was not flammable in contact with water.
Self-heating:
The tested representative Rare Earth alloy VACODYM VD 687 is a self-heating substance, class 4.2 and the packaging group II is assigned.
Since the self-heating behaviour depends on the Rare Earth content and the particle size of the alloy, the terbium alloys under consideration should also be classified.
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.
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