Magnesium hydroxide is A white, bulky powder. It dissolves in dilute acids, but is practically insoluble in water and in alcohol. It is white or almost white, fine, amorphous powder, practically insoluble in water. It dissolves in dilute acids.

Magnesium hydroxide is an excellent flame retardant for plastic and rubber products. As a flue gas desulfurizer in environmental protection, it can replace caustic soda-and lime as neutralizing agent for acid-containing wastewater. It is also used as an oil additive for anticorrosion and desulfurization. In addition, it can also be used in the electronics industry, medicine, sugar refining, analytical reagent, alkalinge agent ,color retention, as insulation materials and manufacturing other magnesium salt products.

Magnesium hydroxide is used as PE, PP, PVC, unsaturated polyester, epoxy resin; In the chemical industry, used as flame retardant and filler for plastics, rubber and other polymer materials; In environmental protection as flue gas desulfurization agent, can replace causti c soda and lime as a neutralizing agent for acid wastewater.

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The chemical composition of magnesium hydroxide, calculated by weight, consists of 58.62% hydroxide and 41.38% magnesium. Chemical formula Mg (OH) 2. Molecular weight 58.33. Colorless hexagonal crystal. Chemicalbook relative density 2.36. Almost insoluble in water and alcohol, with a solubility (18 ºC) of 0.0009g/100mL in water and a solubility product of 1.2 × 10-11, the aqueous solution is weakly alkaline. 

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