annual output for high purified Magnesium Hydroxide-Mg(OH)2 reaches 20,000 tons and ... guarantee 98.5% min, or eve99.0%-99.4 Magnesium Hydroxide-Mg(OH)2Shindoo uses high quality MgCl2 reacting with ... % min, or even 99.0%-99.4%.Produced by Best Magnesium Co., LtdPackage: 50kgIndex ItemQualifiedMg(OH)2 % ≥98.5CaO % ≤0 ... % ≤0.003Chloride(Cl)%≤0.3Loss on Ignition %≤31Whiteness ≥90 Magnesium Hydroxide-Mg(OH)2