Sodium tungstate : Molecular formula : Na2WO4.2H2O Molecular weight: 329.86 Quality standard : Content 99.5%; 98.5%

Sodium tungstate :

Molecular formula : Na2WO4.2H2O

Molecular weight: 329.86

Quality standard : Content ≥ 99.5%; 98.5%

Sodium Tungstate Na2WO42H2O

index name	index%
	High-class	Refined	Crude
WO3	≥69.0	≥69.0	≥68.0
Mo	≤0.02	≤0.02	≤0.04
As	≤0.001	≤0.002
Cu	≤0.0002
Fe	≤0.001	≤0.002
SO4		≤0.02	0.01
Si	≤0.004		≤0.04
Water insoluble impurities (%)	≤0.005	≤0.01
PH	8.5-9	8.5-9
Heavy metal (Pb)	≤0.001	≤0.002
Cl		≤0.03

Uses: used for producing tungsten; as catalyst, mordant, pigment and analytical reagent and fabric weighting agent in textile industry; for producing fire retardant and water-proof fabrics..

Packing: pail, paper board pail or clad bag(plastics bag lining inside), net weight 50kg.per unit.

Sodium tungstate