Characteristic

Sodium periodate is an inorganic salt, composed of a sodium cation and the periodate anion. It may also be regarded as the sodium salt of periodic acid.

Chemical formula：NaIO₄

Molar mass：213.8918 g/mol

Appearance：white crystals

Density：3.865 g/cm³ (anhydrous)   3/210 g/cm³

Melting point：300 °C (572 °F; 573 K) (anhydrous)

                          175 °C (347 °F; 448 K) (trihydrate) (decomposes)

Solubility in water：soluble

Solubility：soluble in acids

Crystal structure：tetragonal (anhydrous)    trigonal (trihydrate)