The role of magnesium hydroxide

Magnesium hydroxide, chemical formula Mg (OH) 2, formula quantity 58.32. White amorphous powder. It is difficult to dissolve in water, but easy to dissolve in dilute acid and ammonium salt solution. The concentration of saturated aqueous solution is 1.9 mg / L (18 ℃), which is alkaline. When heated to 350 ℃, the water is lost to form magnesium oxide. It is used as analytical reagent and pharmaceutical industry. Magnesium hydroxide can be obtained by reaction of magnesium oxide with water.


Chemical properties: decompose to magnesium oxide at 380 ℃. It is a medium strong base, and the water-soluble part is completely ionized to produce Mg2 + (50%), oh - (8%) (and [MgO2] 2 - (or write [Mg (OH) 4] 2 -) and [MGO3] 4 - (or write [Mg (OH) 6] 4 -) (42%) (42%). We generally call the hydroxides dissolved in water ionized into metal cations and hydroxyl complexes and a part of hydroxyl radicals. , It has the general use of alkali Magnesium hydroxide is widely used as flame retardant filler for PE, PP, PVC, ABS, PS, hips, PA, PBT, unsaturated polyester, epoxy resin, rubber, paint, chemical industry, environmental protection and other industrial fields; it is used as an excellent flame retardant and filler for polymer materials such as plastics and rubber; it can be used as flue gas desulfurization agent in environmental protection, instead of caustic soda and lime as neutralizing agent of acid containing wastewater; it can be used as neutralizing agent for acid containing wastewater It is used in the refining of electronic industry, medicine, granulated sugar, insulation material and other magnesium salt products. Common magnesium hydroxide: used in rubber, plastic, paint, coating, chemical industry and other industries. Active magnesium hydroxide: active magnesium hydroxide flame retardant is widely used in rubber, chemical industry, building materials, plastics (polypropylene, polyethylene, polyvinyl chloride, ethylene propylene diene monomer) and electronic, unsaturated polyester, paint, coating and other polymer materials, especially for mine air duct coating cloth, PVC whole core transport belt, flame retardant rubber plate, tarpaulin, PVC wire and cable material, mining cable The flame retardant, smoke elimination and antistatic of sheath and cable accessories can replace aluminum hydroxide and have excellent flame retardant effect.