DryPowder, WetSolid; WetSolid
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Zirconium (IV) hydroxide is often called hydrous zirconia. It has an indeterminate chemical formula often described as ZrO2.nH2O. The formula ZrO2.2H2O being written as Zr(OH)4 gives rise to its description as a hydroxide. The compound is a toxic, amorphous white powder which is insoluble in water, but is soluble in dilute mineral acids.