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Ultra-Fine High-Purity Synthetic Magnesium Hydroxide ZF-21
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  • Ultra-Fine High-Purity Synthetic Magnesium Hydroxide ZF-21
  • Ultra-Fine High-Purity Synthetic Magnesium Hydroxide ZF-21
  • Ultra-Fine High-Purity Synthetic Magnesium Hydroxide ZF-21
  • Ultra-Fine High-Purity Synthetic Magnesium Hydroxide ZF-21
  • Ultra-Fine High-Purity Synthetic Magnesium Hydroxide ZF-21
  • Ultra-Fine High-Purity Synthetic Magnesium Hydroxide ZF-21
  • Ultra-Fine High-Purity Synthetic Magnesium Hydroxide ZF-21
  • Ultra-Fine High-Purity Synthetic Magnesium Hydroxide ZF-21

Ultra-Fine High-Purity Synthetic Magnesium Hydroxide ZF-21

ZF-21 is a high-purity, ultrafine, chemically synthesized magnesium hydroxide characterized by a uniform particle size distribution and regular morphology. It is suitable for use in various polymer systems, including thermoplastic and cross-linked polyolefins, PVC, elastomers, and engineering plastics. This product delivers excellent processing characteristics, mechanical properties, and color stability; it effectively enhances the flame retardancy of polymer materials while simultaneously reducing smoke density. Furthermore, it maintains superior performance even in highly filled systems.

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  • Product Details
  • Characteristics
  • FAQ

Magnesium Hydroxide Content (Pre-coating) (%):

≥99

Loss on Ignition (800°C) (%):

≥30

Whiteness (Hunter):

≥97

Median Particle Size (d50):

1.0  µm

Chloride Ions (%):

≤0.05

Iron Ions (%):

≤0.005

Free Moisture (%):

≤0.5

Note:

The listed data represent typical reference values ​​for product performance parameters and do not constitute product specifications.

ZF-21 is an ultra-fine, high-purity synthetic magnesium hydroxide manufactured through a controlled chemical precipitation process, delivering batch-to-batch consistency that mineral-sourced alternatives cannot match.

With a magnesium hydroxide content of ≥99% and a median particle size (d50) of 1.0 μm, ZF-21 achieves exceptional fineness that promotes uniform dispersion throughout the polymer matrix. Hunter whiteness of ≥97 ensures no visible colour impact on the finished compound. Very low ionic impurities — Fe³⁺ ≤ 0.005% and Cl⁻ ≤ 0.05% — make ZF-21 suitable for electrically sensitive applications where long-term dielectric performance must be protected.

The regular crystal morphology and narrow particle size distribution maintain excellent melt flow and mechanical strength even at high filler loadings. Effective flame retardancy is achieved through endothermic decomposition and water vapour release, simultaneously reducing smoke density.

Compatible with thermoplastic and crosslinked polyolefins, PVC, elastomers, and engineering plastics. Multiple surface treatment grades (A, B, F, J, N, S, X) are available to optimise hydrophobicity, elongation at break, processing flowability, and oxygen index for specific end-use requirements including LSZH cable compounds and halogen-free elastomer systems.

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About Zhuofeng
Industrial Fire-Retardant Solutions

Jiangsu Zhuofeng New Materials Technology Co., Ltd. was established in 2020. It is a supplier specializing in the research, production, and marketing of high-performance and environmentally friendly flame retardants. The company's main products include environmentally friendly flame retardants, flame retardant masterbatches, char-forming agents, composite flame retardants, magnesium oxide, etc. Relying on mature products and process technologies as well as standardized management, the company has established several mature high-purity, ultra-fine, and cost-effective flame retardant production lines, established a flame retardant polymer material application testing laboratory, and has carried out industry-university-research cooperation to develop and optimize flame retardant products. The founding team of Zhuofeng Technology has gathered a group of talents who have long been engaged in the research, production, marketing, and management of various functional materials. They can provide users with prompt technical support for application use. At Zhuofeng Technology, we are dedicated to meeting our customers' needs by delivering stable, high-performance, and environmentally friendly flame-retardant product lines. Company strength data: Industry Experience: 6 years; Plant Scale: 18,000 square meters; Production Capacity:20000 tons.

  • 2020Year

    Establishment

  • 18000m²

    Plant Area

  • 10000ton

    Production Capacity

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