主含量大于99%，有色金属元素铁(Fe)≤3--5PPm；铜(Cu)、镍(Ni)、钴(Co)、锰(Mn)、铬(Cr)、钛(Ti)、钒(V)均≤1PPm；二氧化硅≤0.1%，灼烧损失（wt%)≤0.1—0.35%.
     The main content of the above products 99%, non-ferrous metal element fe ≤ 3 - 5ppm; copper, nickel, cobalt, manganese, chromium、Titanium and vanadium are ≤ 1ppm; silica ≤ 0.1%, ignition loss (wt%) ≤ 0.1 – 0.35%