Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

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Administrative data

Link to relevant study record(s)

relative self-ignition temperature (solids)
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:

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 2008b, 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 other tungsten compounds (>300 °C for tungsten carbide) support the conclusion that self-heating is not a relevant hazard for this compound.

Key value for chemical safety assessment

Additional information