China Magnesium Hydroxide Manufacturers Suppliers Factory - Magnesium Hydroxide Price

High-Purity Magnesium Hydroxide (MDH) Manufacturer | Halogen-Free Flame Retardant & Industrial Material Solutions

Luoyang Zhongchao New Material Co., Ltd. manufactures high-performance Magnesium Hydroxide (MDH) powder for flame retardant compounds, engineering plastics, wire & cable, rubber and environmental applications.

With over 20 years of inorganic material manufacturing experience, we provide stable-quality MDH grades with controlled particle size, high whiteness, surface modification options, and customized solutions for global industrial customers.

Product Parameter

Item	MH-1	MH-2	MH-1 DL	MH-2 DL	MH-N2	MH-N3
Attached Water(%)	<0.5	<0.5	<0.5	<0.5	<0.5	<0.5
Mg(OH)₂ (%)	≥99.8	≥99.8	≥98.0	≥98.0	/	/
Whiteness(%)≥	＞98.0	＞98.0	＞98.0	＞98.0	＞96.0	＞96.0
D50(μm)	1.0-1.3	1.8-2.2	/	/	1.7-2.3	2-2.5
Oil Absorption(DOP)	35-40	33-37	30-35	28-32	32-38	35-45
Specific Surface Area(m²/g)	6.5-9	3-5.5	6-9	3-5.5	2-4	8-9
pH	10-11	10-11	10-11	10-11	9-11	9-11
Conductivity (μS/cm)	＜200	＜200	＜100	＜100	＜100	＜100
L.O.I(%)	> 30.8	> 30.8	> 30.6	> 30.6	/	/
325 Screen Residue (%)	＜0.1	＜0.1	＜0.1	＜0.1	＜0.1	＜0.1
Bulk Density (g/L)	220-300	400-450	220-300	450-500	380-480	250-350
Microstructure	Hexagonal platelet	Hexagonal platelet	Hexagonal platelet	Hexagonal platelet	Hexagonal platelet	Hexagonal platelet

Magnesium Hydroxide Grades for Different Industrial Applications

To meet different processing requirements, ZC-TECH provides multiple Magnesium Hydroxide grades with controlled particle size, purity, whiteness, surface area, and surface modification options.

Grade	Main Characteristics	Recommended Applications
MH-1	High purity, fine particle size, excellent flame retardant performance	Engineering plastics, PP, PA, ABS compounds
MH-2	Balanced particle size and processing performance	General polymer flame retardant applications
MH-1 DL	Surface-treated grade with improved polymer compatibility	Wire & cable, LSZH/HFFR compounds
MH-2 DL	Modified surface performance for high filler loading systems	EVA, PE, PVC and other polymer systems
MH-N2	High whiteness and suitable particle distribution	Coatings, adhesives, sealants
MH-N3	Environmental treatment grade with good acid neutralization performance	Wastewater treatment and flue gas treatment

Comparative Analysis: MDH vs. ATH (Why Choose Magnesium Hydroxide?)

Magnesium Hydroxide (MDH) and Aluminum Hydroxide (ATH) are both widely used environmentally friendly flame retardants. However, MDH provides advantages in applications requiring higher processing temperatures and better smoke suppression performance.

Feature / Property	Magnesium Hydroxide (Mg(OH)₂)	Aluminum Hydroxide (Al(OH)₃)	Why It Matters to You
Thermal Decomposition	Approx.340°C	Approx. 200°C	MDH allows higher processing temperatures without premature decomposition, ideal for PP, PA, and ABS.
Endothermic Heat	1.37kJ/g	1.05kJ/g	MDH absorbs more heat during combustion, improving flame retardant efficiency.
Smoke Suppression	Excellent	Good	MDH acts as a more powerful smoke suppressant and acid gas absorber.
Hardness (Mohs)	2.5	3.0	MDH is less abrasive to compounding extruders and molds, extending equipment lifespan.

Recommended Magnesium Hydroxide Grades by Application

Selecting the correct MDH grade is critical for achieving flame retardant performance, dispersion, mechanical strength, and processing stability.

Application	Key Requirements	Recommended Grade
Wire & Cable (HFFR / LSZH)	Low moisture absorption, excellent dispersion, high mechanical retention	MH-1 DL, MH-2 DL
Engineering Plastics (PP, PA, ABS)	High purity, thermal stability, high filling capability	MH-1, MH-2
Rubber & Elastomers	Good flame retardancy while maintaining flexibility	MH-1, MH-2, DL Series
Wastewater & Flue Gas Treatment	High neutralization efficiency, stable chemical performance	MH-N3
Coatings, Adhesives & Sealants	Fine particle size and high whiteness	MH-N2

Custom Surface Modification Services

To prevent compounding degradation and improve mechanical retention at high filler loadings (up to 60%+), ZC-TECH offers advanced, customized surface treatments for our Magnesium Hydroxide powder:

Silane Coupling Agents (Vinyl, Amino, Epoxy, Methacryl): Optimizes bonding with EVA, PE, PP, and engineering thermoplastics.

Stearic Acid / Fatty Acid Coating: Enhances hydrophobicity and dispersion in rubber, elastomers, and PVC.

Polymer Wax / Customized Coatings: Designed for customized melt flow indexes (MFI) and specific viscosity requirements.

Processing Recommendations for Polymer Manufacturers

When incorporating high loading levels of inorganic flame retardants, optimized processing conditions are essential to maintain product performance.

Feeding Method

Side feeding Magnesium Hydroxide after polymer melting is recommended to improve dispersion and reduce processing issues.

Processing Temperature

Maintain processing temperatures below 340°C to avoid premature release of crystal water.

Screw Configuration

Low-to-medium shear screw designs with proper dispersion elements are recommended to minimize particle agglomeration.

Quality Assurance & Global Standards

At ZC-TECH, we don't just sell chemicals—we guarantee quality. Our production process is highly standardized to meet the stringent demands of global buyers.

ISO Certified Manufacturing

Our factories operate under strict compliance with the ISO 9001:2015 Quality Management System.

Full Environmental Compliance

All MDH grades are 100% halogen-free, non-toxic, and fully compliant with RoHS, REACH, and SVHC regulations. Third-party testing reports (SGS/TUV) are updated annually.

Advanced In-house R&D & Testing

Our state-of-the-art laboratory is equipped with Malvern Mastersizer laser particle size analyzers, whiteness meters, and TGA instruments. Every shipped batch comes with a detailed Certificate of Analysis (COA).

Certificate

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FAQ

Q: What is your standard lead time for a FCL (Full Container Load) order?

A: For standard grades, we ship within 7 to 10 working days from order confirmation. Custom surface-treated grades (e.g., DL series) typically take 10 to 15 days depending on our production schedule.

Q: Do you accept third-party pre-shipment inspections?

A: Yes. We welcome international inspection agencies such as SGS, BV, or Intertek to conduct quantity verification, packaging checks, and laboratory testing before container sealing.

Q: Can you provide customized packaging or private labeling (OEM)?

A: Yes. We offer customizable packaging options, including neutral bags, custom pallet sizes (ISPM 15 certified heat-treated wooden or plastic pallets), and customized stretch wrapping/corner protectors.

Q: Do you offer flexible payment terms for long-term partners?

A: While we start new relationships with standard T/T or L/C at sight, we are open to offering flexible credit terms (such as OA or DP) for established global partners after a credit history assessment.

Q: How do you guarantee batch-to-batch color and particle size consistency?

A: We use an automated DCS production system to control raw feed rates. Every single batch is sampled and tested on our Malvern particle size analyzer and whiteness meter. We record and retain retain-samples for 2 years for quality traceability.

Q: What is the difference between standard MDH and surface-treated MDH?

A: Standard MDH is suitable for general flame retardant applications, while DL series improves compatibility with polymer matrices and supports higher filler loading.

As one of the most professional magnesium hydroxide manufacturers and suppliers in China, we have world-leading production equipment and strong manufacturing capabilities. Please rest assured to buy high quality magnesium hydroxide made in China here from our factory. For price consultation, contact us.