Ammonium Paratungstate

Ammonium paratungstate (or APT) is a white crystalline salt of ammonium and tungsten, raw material of Sodium Tungstate and Tungsten Trioxide production.

  1. Formula: 5(NH4)2O.12WO3.5H2O.
  2. Appearance: Free flowing white crystalline powder with no any other cast or foreign matter.
  3. Ignition Loss: 11.5%max
  4. Fsss: 35-46 micron.
  5. Packing: In iron drums with inside plastic bags of 100kg or 200kg net each.
ammonium paratungstate
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Grade properties

 Grade  APT-0
 WO3(%min)  88.5
 Impurities(%max)  Al  Fe  S  As  P  Mo  Ca  Mg  K  Na  Si
 0.0005  0.001  0.0007  0.001  0.0007  0.002  0.001  0.0007  0.001  0.001  0.001
 Cu  Mn  Ni  Pb  Bi  Sn  Sb  V  Ti  Cr  Co
 0.0003  0.001  0.0007  0.0001  0.0001  0.0008  0.001  0.001  0.001  0.001  0.001

Remarks:
1) APT-0 is high purity material for special uses.
2) Material of 40-46 micron is mainly used for producing tungsten bar for drawing wire
3) Any special requirement to the products can be discussed.”