Property: Prism figure crystal, no stabilization and release CO2 and NH3 sowly in air, easily dissolved in water, dilutes acid andalkali and decompound. Relative Density is 1.238. Application: Used as additive in paperand textile industry, cross-link of colophony polymer. Storage: To be prevented from solarization. It should be airproof and stored in cool and dry place. Specification: ZrO2+HfO2 SiO2(max) Fe2O3(max) Na2O(max) TiO2(max) PH 16-20% 0.01% 0.002% 0.01% 0.002% 9-9.5% Packing250kg net in plastic drum.