88.5% ammonium paratungstate referred to the ammonium paratungstate powder with tungsten oxide content of not less than 88.5% and the remaining components as impurities such as Al, Co, Mo, Cu, Ni, and so on. Its grade is APT-0 or APT-1 according to Chinese national standards.
The components of APT-0 ammonium paratungstate (main content of WO3 and others of impurities) provided by Chinatungsten Online is as follows:
WO3 occupies 88.50% of total weight or even higher; Al≤0.0005%; As≤0.0010%; Bi≤0.0001%; Ca≤0.0010%; Cd≤0.0010%; Cr≤0.0010%; Co≤0.0010%; Cu≤0.0003%; Fe≤0.0010% ;Mg≤0.0005%; Mn≤0.0005%; Mo≤0.0020%; Na≤0.0010%; Ni≤0.0005%; K≤0.0010%; P≤0.0007%; Pb≤0.0001%; S≤0.0008%; Sb≤0.0005%; Si≤0.0010%; Sn≤0.0001%; Ti≤0.0010%; V≤0.0010%; Burning loss≤11.5%.
The components of APT-1 ammonium paratungstate supplied by Chinatungsten Online is as follows:
WO3 content ≥88.5%; Al≤0.0010%; As ≤0.0010%; Bi≤0.0001%; Ca≤0.0010%; Cd≤0.0010%; Cr≤0.0010%; Co≤0.0010%; Cu≤0.0005%; Fe≤0.0010% Mg≤0.0010%; Mn≤0.0007%; Mo≤0.0030%; Na≤0.0015%; Ni≤0.0005%; K≤0.0015%; P≤0.0010%; Pb≤0.0001%; S≤0.0010%; Sb≤0.0010%; Si≤0.0010%; Sn≤0.0003%; Ti≤0.0010%; V≤0.0010%.
More details, please visit:
http://www.ammonium-paratungstate.com/english/index.html
