Zirconium Basic Sulphate Main purposes: to make in the tanning agents, catalysts, bleaching agents, preparation of zirconium series compounds Appearance: Solid Physical properties: Not soluble in water, odorless, insoluble in organic acid Chemical indicators: Zr (Hf) O2: 36% -38% Na2O: 0.01% Fe2O3: 0.002% SiO2: 0.01%