Effect of magnesium hydroxide

Magnesium hydroxide, chemical formula Mg (OH) 2, formula weight 58.32. White amorphous powder. It is insoluble in water and soluble in dilute acid and ammonium salt solutions. The concentration of saturated aqueous solution is 1.9 mg/l (18 ℃), which is alkaline. When heated to 350 ℃, the water will lose its magnesium oxide. It is used as an analytical reagent and also in the pharmaceutical industry. Magnesium hydroxide can be obtained by reacting magnesium oxide with water.
Chemical property: It is decomposed into magnesium oxide at 380 ℃. It is a medium strong base, and the part dissolved in water is completely ionized to produce Mg2+(50%), OH - (8%) (and [MgO2] 2 - (or [Mg (OH) 4] 2 -) and [MgO3] 4 - (or [Mg (OH) 6] 4 -) (42%). We generally call the hydroxide dissolved in water ionized into metal cations and hydroxyl complexes and a part of hydroxyl radical as a medium strong base., The general use of alkali magnesium hydroxide is widely used in PE, PP, PVC, ABS, PS, HIPS, PA, PBT, unsaturated polyester, epoxy resin, rubber, flame retardant filler of paint, chemical industry, environmental protection and other industrial fields; It is an excellent flame retardant and filler for polymer materials such as plastics and rubber. It can be used as flue gas desulfurizer in environmental protection and can replace caustic soda and lime as neutralizer for acid containing wastewater; It can be used as oil additive to prevent corrosion and desulfurization; Used for the refining of electronic industry, medicine and sugar; It is used for thermal insulation materials and other magnesium salt products. Ordinary 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), electronics, unsaturated polyester, paint, coating and other polymer materials, especially for flame retardant, smoke suppression and anti-static of coated cloth for mine air duct, PVC whole core transport belt, flame retardant rubber sheet, tarpaulin, PVC wire and cable material, mine cable sheath, cable accessories, It can replace aluminum hydroxide and has excellent flame retardant effect.