Effect of magnesium hydroxide

Magnesium hydroxide, chemical formula Mg (OH) 2, formula amount 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 aquatic magnesium oxide is lost. It is used as analytical reagent and also used in pharmaceutical industry. Magnesium hydroxide can be obtained by reaction of magnesium oxide with water.
Chemical property: decomposed into magnesium oxide at 380 ℃. It is a moderately strong base, which is partially ionized in water to produce Mg2+(50%), OH - (8%) (and [MgO2] 2 - (or written in [Mg (OH) 4 -) and [MgO3] 4 - (or written in [Mg (OH) 6] 4 -) (42%). Generally, we call the hydroxides that are soluble in water and ionized into metal cations and hydroxyl complexes and a part of hydroxyl radicals as moderately strong bases., Magnesium hydroxide is widely used in PE, PP, PVC, ABS, PS, HIPS, PA, PBT, unsaturated polyester, epoxy resin, rubber, flame retardant filler for paint, chemical industry, environmental protection and other industrial fields; Excellent flame retardant and filler for polymer materials such as plastics and rubber, used as flue gas desulfurizer in environmental protection, can replace caustic soda and lime as neutralizer for acid-containing wastewater; It can be used as oil additive to prevent corrosion and desulfurize; Used for refining of electronic industry, medicine and granulated sugar; It is used for thermal insulation materials and other magnesium salt products. Ordinary magnesium hydroxide: used in rubber, plastic, paint, paint, chemical and other industries. Active magnesium hydroxide: active magnesium hydroxide flame retardant, widely used in rubber, chemical industry, building materials, plastics (polypropylene, polyethylene, polyvinyl chloride, EPDM) and electronic, unsaturated polyester, paint, coating and other polymer materials, especially for the flame retardant, smoke suppression and anti-static of mining air duct coating cloth, PVC whole-core conveyor belt, flame retardant rubber plate, tarpaulin, PVC wire and cable material, mining cable sheath, cable accessories, It can replace aluminum hydroxide and has excellent flame retardant effect.