Registration Dossier
Registration Dossier
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EC number: 215-231-4 | CAS number: 1314-35-8
Flammability
Administrative data
Link to relevant study record(s)
- Endpoint:
- flammable solids
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- other:
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.7a.: Endpoint specific guidance May 2008, when an inorganic element is in its highest possible oxidation state is incapable of further reaction with oxygen and can thus be designated as non-flammable. The highest oxidation state of tungsten is VI and the oxidation state of tungsten in this compound is VI. Thus, the substance can be considered non-flammable and non-pyrophoric.
Key value for chemical safety assessment
- Flammability:
- not classified
Additional information
Justification for classification or non-classification
Tungsten in tungsten trioxide is its in highest possible oxidation state and incapable of further reaction with oxygen. Thus, tungsten trioxide can be considered non-flammable and non-pyrophoric.
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