Magnesium Hydroxide Flame Retardant Products >Magnesium Hydroxide Flame Retardant


Our magnesium hydroxide flame retardant is made from brucite without any chemical reaction. It is a good inorganic flame retardant which can be widely used as halogen free flame retardant for plastics, rubbers and coating. The highest processing temperature can be 300 centigrade. Because of its good property and competitive price, it can be used to produce halogen free flame compound instead of aluminum hydroxide.

Why is Magnesium Hydroxide (MDH) flame retardant better than Aluminum Hydroxide (ATH) flame retardant?

1. MDH and ATH are similar when heated. They both create water and metal oxide. Water absorbs heat, and metal oxide covers the surface. But MgO absorb more acid.
2. Magnesium hydroxide (MDH) degrades at 330℃, 100℃ higher than Aluminum Hydroxide (ATH) does, so MDH is more suitable as flame retardant for processing plastics with high temperature.
3. MDH dissociation energy is 1.37kJ/g; ATH dissociation energy is 1.17KJ/g; and thermal capacity of MDH is 17% higher than ATH also. So MDH have higher flame retardant efficiency.
4. Magnesium hydroxide with more carbonization can reduce more smoke.
5. MDH particle is softer than ATH, so less abrasion will happen during compounding process. It’s good for compounding machine.

Commercial name:Brucite
Key component:Mg (OH)2
Key words
Inorganic flame retardant
Magnesium hydroxide
Brucite powder
Halogen free flame retardant

Data Sheet

Grade XK-325 XK-1250 XK-5000 XK-10000
Mg(OH)2 content % 94 94 94 94
Moisture content % 0.5 0.5 0.5 0.5
Loss on ignition % 31 31 31 31
Particle Size D97 45 18 6.5 3
D90 38 15 5.5 2
D50 15 4 2 1.5
Specific surface area (m2/g) ≤6 ≤6 ≤8 ≤8
Density (g/cm3) 2.3 2.3 2.3 2.3
Oil absorption (ml/100g) 50 55 55 55
Whiteness (R45T%) 90 92 95 96
Specific conductivity (uS/cm) 350 350 350 350
Stearic acid % 0.5~2 (will be coated according to customer demands) Grade: XK-1250SA, XK-5000SA, XK-10000SA
Silane % 0.5~1 (will be coated according to customer demands) Grade: XK-1250S, XK-5000S, XK-10000S


25kg/bag PP woven bag with PE liner/paper bag with PE liner
1000kg/bag, Jumbo bag


Store in dry and cool place, and keep away from moisture


This is not dangerous product. Please make sure there are covers avoid raining and moisture during transportation.

Application Sample

Aluminum Composite Panel Halogen free flame retardant cable

Halogen free flame retardant floor board

Halogen free flame retardant pipe Halogen free flame retardant construction board