Magnesium hydroxide molecular formula: Mg(OH)2

Magnesium hydroxide molecular weight: 58.32

English name of magnesium hydroxide: Magnesium hydroxide;

Physical and chemical properties of magnesium hydroxide: colorless cubic columnar crystal (solid);

Density of magnesium hydroxide: 2.36 g/cm3;

Magnesium hydroxide is sparingly soluble in water and alcohol, easily soluble in dilute acids and ammonium salt solutions, and is a medium strong base. Its solubility in water (18°C) is 0.0009 g/100 g, easily absorbs carbon dioxide from the air, transforms into hexagonal crystal system when heated to above 200°C in alkaline solution, decomposes into magnesium oxide and water at 350°C, and loses water to transform into magnesium oxide above 500°C. Particle size 1.5-2 μm, mesh 10000, whiteness ≥95.

Magnesium hydroxide is currently recognized as an excellent flame retardant with triple functions of flame retardancy, smoke suppression, and filling in the rubber and plastic industries. It has characteristics such as halogen-free, low smoke, non-toxic, anti-drip, acid resistance, odorless, good stability, non-volatile, high decomposition temperature, and non-corrosive to equipment. It is the preferred material for halogen-free flame retardancy of organic polymers. Magnesium hydroxide flame retardant releases bound water when heated and decomposes, absorbing a large amount of latent heat to lower the surface temperature of the synthetic material it fills in the flame. It inhibits polymer decomposition and cools the combustible gases produced. The magnesium oxide generated by decomposition is also a good refractory material, helping to improve the fire resistance of synthetic materials. At the same time, the water vapor released can also act as a smoke suppressant.

The inorganic flame retardant - magnesium hydroxide produced by Hongtai Ji Industry has advantages such as small particle size (5000-7500 mesh), uniform particle size, high specific volume, good expansion, easy mixing and co-processing, and good flame retardant effect. It can significantly improve the flame retardancy, smoke suppression, and anti-drip effects of polymers, and also has a filling function. Suitable for flame retardant filling in rubber, nylon, plastic, paint, coatings, paper and other industries.

Technical indicators of magnesium hydroxide flame retardant:

MgO: ≥62%

Specific gravity: g/cm3 2.40

Mohs hardness: 2.50

Wetting temperature: 340°C

Thermal weight loss: ≤31.0

Moisture: (110°C) ≤0.8

Whiteness: ≥30

pH: 10±1

Particle size: 3000 mesh to 7000 mesh