Registration Dossier
Registration Dossier
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EC number: 234-733-4 | CAS number: 12028-48-7
Auto flammability
Administrative data
Link to relevant study record(s)
- Endpoint:
- relative self-ignition temperature (solids)
- Data waiving:
- other justification
- Justification for data waiving:
- other:
- Justification for type of information:
- Data waiving
Reason: Other justification
Justification: According to the ECHA Guidance on information requirements and chemical safety assessment Chapter R.9: Physico-chemical hazards May 2008, the relative self-ignition temperature is the minimum temperature at which a certain volume of a substance will ignite under defined conditions. Tungsten, in this compound, is in its highest possible oxidation state (VI) and is incapable of further reaction with oxygen. Therefore, this compound is not expected to ignite. Furthermore, the high self-ignition values reported for powders of tungsten metal (310 °C; from Neikov et al, 2005) and tungsten carbide (>300 °C; from H.C. Starck, 2005, as cited in OECD, 2005) support the conclusion that self-ignition is not a relevant hazard for this substance.
Reference
Description of key information
Data waiving
Reason: Other justification
Justification: According to the ECHA Guidance on information requirements and chemical safety assessment Chapter R.9: Physico-chemical hazards May 2008, the relative self-ignition temperature is the minimum temperature at which a certain volume of a substance will ignite under defined conditions. Tungsten, in this compound, is in its highest possible oxidation state (VI) and is incapable of further reaction with oxygen. Therefore, this compound is not expected to ignite. Furthermore, the high self-ignition values reported for powders of tungsten metal (310 °C; from Neikov et al, 2005) and tungsten carbide (>300 °C; from H.C. Starck, 2005, as cited in OECD, 2005) support the conclusion that self-ignition is not a relevant hazard for this substance.
Key value for chemical safety assessment
Additional information
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.
