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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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 dioxide is a solid inorganic substance which forms brown, monoclinic crystals. It is solid at room temperature with a melting point of ca. 1500 degrees C and a relative density of 10.7161 g/cm³. The substance as manufactured has a median particle size of 14.57 µm, with approximately 90% of the mass smaller than 27.17 µm. Tungsten dioxide is slightly soluble in water (4.2 mg/L in the T/D test). The substance is neither auto-flammable nor flammable and has also no oxidizing properties.

Additional information