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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint summary

Administrative data

Description of key information

Tungsten oxide is a solid which ranges from dark blue to black with a melting and boiling point of 1472 and 1837°C, respectively (both read across to tungsten trioxide); and a relative density between 7.0 -7.3 g/cm³. Tungsten oxide has a low water solubility of 62 mg W/L (at a loading of 100 mg/L and pH of 8.5) as determined by the transformation/dissolution study, and a particle size distribution (D50= 28.32 µm) in the micro-sized range.

Additional information