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Physical & Chemical properties

Water solubility

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Description of key information

A transformation/dissolution test equivalent to the OECD guideline for testing of chemicals on transformation dissolution of metals and metal compounds in aqueous media is available showing that tungsten dioxide is slightly soluble in water.

Key value for chemical safety assessment

Water solubility:
4.2 mg/L
at the temperature of:
23.5 °C

Additional information

Tungsten dioxide was found to be most soluble at a pH of 8. The respective W-concentrations of about 4.2 mg/L for the 7 day, 100 mg/L loadings at pH 8 indicate that the substance is slightly soluble (0.1–100 mg/L).