Tungsten oxide(Tungsten trioxide) is a powder metallurgy raw material for the production of hard alloys and tungsten products etc.

It can be classified into: yellow tungsten and blue tungsten according to the national standard (GB/T 3457-1998).

Yellow tungsten, also known as tungsten trioxide,light yellow crystalline powder,molecular formula WO3. 

Blue tungsten, also known as blue tungsten oxide (a kind of mixed tungsten oxide), deep blue or blue-black crystalline powder,molecular formula W20O58 .

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