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          Tungsten trioxide  

          WO3

          Chemical formula: WO3
          Properties: light yellow powder, insoluble in water and acid (except for HF), can slowly dissolved in concentrated alkali solution.
          Specifications:

          Grade
          FWO3-1
          FWO3-2
          FWO3-3
          WO3 (%)≥
          99.95
          99.9
          99.5
          Impurity content
          (as WO)
          not more than
          %
          Pb
          0.0005
          0.001
          /
          Bi
          0.0005
          0.001
          /
          Sn
          0.0007
          0.001
          /
          Sb
          0.001
          0.001
          /
          As
          0.002
          0.002
          0.010
          Fe
          0.001
          0.005
          0.010
          Al
          0.001
          0.001
          0.002
          Si
          0.002
          0.003
          0.008
          Ni
          0.0007
          0.002
           
          Ca
          0.002
          0.003
          (Ca+Mg)
          0.015
          Mg
          0.001
          0.004
          (Mg+Ca)
          0.015
          K
          0.002
          0.002
          (K+Na)
          0.015
          Na
          0.002
          0.004
          (Na+K)
          0.015
          Cu
          0.0007
          0.001
          /
          Mn
          0.001
          0.002
          /
          Mo
          0.005
          0.03
          0.10
          P
          0.0007
          0.004
          0.015
          S
          0.001
          0.001
          0.007
          Chlorination residue
          /
          /
          0.07
          Loss on ignition (%)
          0.5
          0.5
          0.5
          Sieving size (mesh)
          -40 100%
          -40 100%
          -40 100%
          Bulk density g/cm3
          0.5-2.5

          Uses: Used in the manufacture of metal tungsten powder, tungsten carbide powder, tungsten carbide and other tungsten products
          Packing: 25kg Cardboard barrel or plastic woven bag .
          Not: special specifications are negotiable.

           
               
           
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