Sodium Tungstate

Names

IUPAC name   Sodium tungstate

Identifiers

CAS Registry Number   13472-45-2

PubChem       26052

RTECS number     YO7875000

Properties

Chemical formula Na2WO4

Molar mass    293.82 g·mol−1

Appearance    white rhombohedral crystals

Density    4.179 g/cm3 (anhydrous)

3.25 g/cm3 (dihydrate)

Melting point        698 °C (1,288 °F; 971 K)

Solubility in water

57.5 g/100 mL (0 °C)

74.2 g/100 mL (25 °C)

96.9 g/100 mL (100 °C)

Solubility      slightly soluble in ammonia insoluble in alcohol, acid

Structure

Crystal structure   rhombic (anhydrous)

orthorhombic (dihydrate)

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

 

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