Magnesium Hydroxide

Colorless cubic columnar crystal. Density 2.36. Insoluble in water, soluble in ammonium salt solution.

Decomposition at 350 ℃ to produce magnesia. Weigh accurately a sample pre-dried 105 ℃ 2h about 400mg, moved conical flask. Plus lmol / L sulfuric acid 25.0ml, until completely dissolved, add methyl red test solution (TS-149) a few drops of 1mol / L sodium hydroxide excess acid. The consumption of 1mol / L sulfuric acid in the sample by subtracting the volume of the calcium oxide content (see mass index) corresponding to 1mol / L H2SO4, taken out, and the sample is taken is equivalent to Mg (OH) 2 content The 1mol / L H2SO4. Per Ml, 1mol / L sulfuric acid equivalent Mg (OH) 2 29.16mg or CaO28.04mg. 
Uses
used as an antacid and laxative in medicine, also used in the production of sugar and magnesia.
1. Magnesium hydroxide is an excellent flame retardant of plastic and rubber. Environmental aspect as desulfurization agent of flue gas, can replace caustic soda and lime as neutralizer of acidic waste water. Also used as oil additive playing the roles of anti-corrosion and desulfurization. In addition, it can be used in electronics industry, pharmaceutical, sugar refining, manufacturing insulation materials and other magnesium products. 
2..antacid, osmotic laxative. 
3. This product can be used as flame retardant or filler, and can be added into polyethylene, polypropylene, polystyrene, and ABS resin, and offers a good effect on flame retardance and smoke extinguishment, with the dosage of 40 to 20 parts. But it needs use anionic surfactants to handle the surface of particles, you can use can be inexpensive anionic surfactants such as high grade fatty acid alkali metal salt or alkyl sulfates and sulfonated succinic acid ester , the dosgage is about 3%. This product is also used in the manufacture of magnesium salt, sugar refining, pharmaceutical industry and daily chemicals. 
4.Magnesium hydroxide flame retardant filler is a new, released by the combination of the thermal decomposition of water, absorbing large quantities of latent heat, to reduce it in a synthetic material filled in the surface temperature of the flame, and to inhibit the decomposition of the polymer The combustible gas generated by a cooling effect. Decomposition of magnesia refractories is good, but also to help improve the fire resistance of composite materials, and it can also emit water vapor as a smoke suppressant. Magnesium hydroxide is recognized as the rubber industry, flame retardant, flame suppression excellent smoke filled triple feature. Widely used in rubber, chemicals, building materials, plastics and electronics, unsaturated polyesters and paints, coatings and other polymer materials. Especially mine duct coated cloth, PVC whole core conveyor belt, flame retardant plastic plates, flame-retardant tarpaulin, PVC wire and cable, mining cable sheathing, flame retardant cable accessories, smoke antistatic can be replaced by aluminum hydroxide, having excellent flame retardant effect. Magnesium hydroxide compared with similar inorganic flame retardants, has better smoke suppression. Magnesium hydroxide in the production, use and disposal process, no harmful emissions, but also in acidic and corrosive gases produced during combustion. When used alone, the amount is generally 40% to 60%. 5 and the base resin has a good compatibility, a thermoplastic resin and rubber excellent in flame retardant, adhesives commonly used as flame retardant or flame-retardant filler, the reference amount of 40 to 200 parts. For the manufacture of magnesium, magnesium oxide activity, pharmaceuticals, fine ceramics, insulation materials, sugar refining, flue gas desulfurization, oil additives, corrosion, acid waste neutralizer, color TV picture tube cone glass coatings industry.

5.This product can be used as flame retardant or filler, and can be added into polyethylene, polypropylene, polystyrene, and ABS resin, is also used in the manufacture of magnesium salt, sugar refining, pharmaceutical industry and daily chemicals.  Because it gives the steam, it can also be used as a smoke suppressant. Magnesium hydroxide is an excellent flame retardant of rubber industry, with triple functions as flame retardance, smoke suppression and filling.