High Purity Magnesium Hydroxide

English Name: Magnesium hydroxide

Molecular Formula: Mg(OH)2

Molecular Weight: 58.32

Physicochemical Properties: White crystalline or powder; and its aqueous solution show alkaline reaction; 2.36g/cm3. It is soluble in diluted acid and ammonium salt solution and almost insoluble in water and alcohol. Its solubility 18in water is 0.0009g/100g. It is easy to absorb carbon dioxide in the air. When it is heated to above 200 in alkaline solution, it will become hexagonal crystal system crystalline. At 350, it shall decompose into magnesium oxide and water, and change into magnesium oxide by losing water above 500.

Use: Magnesium Hydroxide is excellent flame retardant for plastics and rubber articles. In environmental protection field, it can replace caustic soda and lime as neutralizing agent for acid-containing wastewater. And it also can be used as additive for oil products with corrosion resistance and desulfurization functions. In addition, it can be used in electronic and medicine trade, refining of granulated sugar and also as thermal insulation material as well as for producing other magnesium salt.
Mark                                       QHMS-F 
CAS No.                                1309-48-4 
HS Code                                2519909100 
Original Place                            China 
Description    This white powder is high purity food/feed grade                        magnesium oxide calcined from our high grade magnesium                hydroxide. It has very low heavy metal and arsenic                 content.
Application   It is well suited for many food/feed products as the               additives.
Specification   Mg（OH）2 (ignited basis)            99% min.
                             Chloride                    0.15% max
                             Sulphate                    0.09% max.
                              Iron                      0.007% max
                            Arsenic                     5ppm max
                             Heavy metals                10ppm max
                             Calcium                     0.005% max
                             Silicon                     0.02% max
                      Particle Size              D50=50 35um
Packing    Net 25Kg or 50Kg paper bags with inner plastic lining.            Other packing modes are available according to customers’             request.
Storage    Store in original packing in a dry, ventilated place. If            the contents of a bag are not entirely used after opening,            the bag should be immediately resealed.

Shelf life under suitable                  12 months
                                       storage conditions