Magnesium Hydroxide Mg(OH)₂ is a versatile inorganic flame retardant available in multiple grades (MDH-III-3, MDH-III-10, MDH-I, and modified types with stearic acid/silane).
Magnesium hydroxide
Appearance: White powder, high purity (Mg (OH) ₂ content ≥ 99%), controllable particle size (D50=1-10 μ m), can provide different specifications of nanometer and micrometer products according to needs, ensuring uniform dispersion in the substrate.
Density: 2.36g/cm ³, light specific gravity, and minimal impact on the mechanical properties of the material after addition.
Solubility: Difficult to dissolve in water (solubility 0.0009g/100mL, 20 ℃), excellent water resistance, suitable for humid environments.
Ideal for:
Electronics & Electrical Components: Enhances flame resistance in PCB substrates and connector housings.
Conveyor Belts: Reduces flammability while maintaining flexibility in rubber-based belts.
Construction Materials: Improves fire safety in fireproof boards and insulation foams.
Available with customized surface treatments for optimized polymer compatibility. Bulk supply from ISO-certified China factory.
Physical and Chemical Properties
| Items | Unit | MDH III-3 | MDH III-10 |
| Mg(OH)2 | % | ≥88 | ≥88 |
| CaO | % | ≤3.0 | ≤3.0 |
| Fe | % | ≤0.3 | ≤0.3 |
| PH | % | 9-11 | 9-11 |
| Loss on ignition | % | ≥26 | ≥28 |
| PH | % | 9-11 | 9-11 |
| Whiteness | % | ≥89 | ≥86 |
| Average particle size D50 | µm | ≤3 | ≤10 |
| Sieve analysis | % | ≤0.1 (325mesh) | 0 (200mesh) |
Application : Recommended to be used in wires and cables, copper clad plates(CCL), composite insulators, heat insulation material, etc.
Packaging : Net weight 25kg/bag, Compound paper-plastic bag
Storage and Attention : Keep in dry, room temperature and moisture proof condition, preventing the heating
| Items | Unit | MDH-I |
| Mg(OH)2 | % | ≥98.0 |
| CaO | % | ≤0.2 |
| Moisture | % | ≤1.0 |
| Loss on ignition | % | ≥30 |
| Cl | % | ≤0.2 |
| Fe | % | ≤0.05 |
| PH | — | 10±1.0 |
| Acid Non-dissolve | % | ≤0.08 |
| Whiteness | % | ≥95 |
| Particle size ,D50 | µm | ≤2 |
Packing
20kg/bag, paper-polymer outer & PE inner bag
Storage and Attention: Keep in dry, room temperature and moisture proof condition, preventing the heating
We offer:
Multi specification products: micron level (D50=5 μ m), nanometer level (D50=100nm), surface modified type (silane coating), to meet different process requirements.
Flexible packaging: supports full container load or bulk cargo transportation.
Technical services: Provide free sample testing and formula optimization suggestions to ensure a balance between flame retardant effect and material properties.
Contact us immediately for customized flame retardant solutions!
Get in touch, 24 hours a day, 7 days a week.
Address
Lvye Road West, Diao Town Chemical Industry Park, Mingshui Economic & Technology Development Zone, Zhangqiu, Jinan , China
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