CAS 1314-35-8 tungsten oxide powder WO3 powder 

WO3-YELLOW OXIDE is a fine YELLOW crystalline powder SPECIFICATIONS: Impurity Content Grade Grade-1 Grade-2 WO3(%min) 99.95 99.95 L.O.LWO3(%max) 0.5 0.5 Impurity Content (%MAX) Al 0.0005 0.001 Fe 0.001 0.001 S 0.007 0.001 As 0.001 0.002 P 0.0007 0.0007 Mo 0.002 0.005 Ca…