Magnesium Hydroxide: Upgraded Material in the Fields of Halogen-Free Flame Retardancy and Environmental Governance and Market Trends in 2026

I. Product Introduction: Core Characteristics of Magnesium Hydroxide and the Latest Specifications in 2026

Magnesium hydroxide is an inorganic functional material with high-efficiency flame retardancy and excellent adsorption properties. Its chemical composition is Mg(OH)₂, and it appears as a white powder or granular form, odorless and tasteless. The particle size distribution is controllable (D50 is usually 1 - 20μm). Its core characteristics are high decomposition temperature (340 - 360°C), excellent smoke suppression, good dispersibility, and halogen-free environmental friendliness. Compared with traditional flame retardants, it is prepared through the process of "high-purity magnesium source precipitation - surface modification - crystal form control", which solves the problems of poor dispersibility and low flame retardancy efficiency of ordinary magnesium hydroxide and adapts to the multi-scenario requirements of polymer material flame retardancy and environmental governance.

Combined with the industry demand upgrade in 2025, magnesium hydroxide is divided into three latest specifications according to application scenarios: special for halogen-free flame retardancy, special for environmental governance, and special for pharmaceutical intermediates. The halogen-free flame retardancy special product has a whiteness ≥ 95%, activation degree ≥ 98%, oil absorption value ≤ 45g/100g, and is suitable for flame retardancy of plastics and rubbers; the environmental governance special product has a purity ≥ 96%, specific surface area ≥ 80m²/g, adsorption capacity ≥ 120mg/g (for phosphate ions), and meets the sewage purification requirements; the pharmaceutical intermediate special product has a purity ≥ 99%, and the total amount of heavy metals (Pb, Hg, As) ≤ 3ppm, meeting the pharmaceutical standards. The preparation process adds the "ultrasonic-assisted precipitation" technology, making the crystal morphology more regular and the dispersibility increased by 50%. Its core functions cover halogen-free flame retardancy, adsorption purification, and pharmaceutical synthesis, making it a key material in the field of green manufacturing and environmental protection.

II. Main Application Areas of the Product: Innovative Application Scenarios of Magnesium Hydroxide

From 2025 to 2026, magnesium hydroxide has achieved breakthroughs in the high-end of halogen-free flame retardancy and the deepening of environmental governance, forming a pattern of multiple empowerment in combination with traditional applications. The specific applications are as follows:

1. Halogen-Free Flame Retardancy Field: The Core of Environmentally Friendly Flame Retardancy for Polymer Materials

In polymer materials such as polypropylene (PP), polyethylene (PE), and EVA, magnesium hydroxide is used as a halogen-free flame retardant to replace halogen-based flame retardants. The addition amount of the halogen-free flame retardancy special product is 40 - 60 parts (based on 100 parts of the polymer matrix). Its surface modification technology improves the compatibility with the substrate. The measured data of a plastic enterprise in 2025 showed that the PP material using silane-modified magnesium hydroxide had an oxygen index of 32%, a vertical burning rating of UL94 V-0, and a smoke density rating (SDR) ≤ 40. The smoke density was reduced by 60% compared with the unmodified product; the tensile strength retention rate reached 85%, solving the problem of the decline in the mechanical properties of the material caused by traditional flame retardants and meeting the A-level standard of GB 8624-2012 "Classification of the Burning Performance of Building Materials and Products".

1. Environmental Governance Field: An Efficient Treatment Agent for Sewage and Solid Wastes

The environmentally friendly magnesium hydroxide special product, its adsorption and neutralization properties, is used for the treatment of phosphorus-containing and heavy metal-containing wastewater and the stabilization of solid wastes. The addition amount of the environmental protection special product is 20 - 50g/L (for wastewater treatment). The operation data of a sewage treatment plant in 2025 showed that when adding 3magnesium hydroxide to treat municipal sewage, the total phosphorus removal rate reached 98%, and the phosphorus concentration in the effluent ≤ 0.05mg/L, which was better than 85% of polyaluminum chloride; in the treatment of electroplating wastewater, the adsorption rate of nickel ions reached 99%, and the heavy metal content in the treated wastewater met the GB 21900-2008 "Discharge Standard of Electroplating Pollutants". In the disposal of solid wastes, adding 10% magnesium hydroxide can reduce the heavy metal leaching amount of waste incineration fly ash by 90%, achieving the harmless disposal of fly ash.

1. Pharmaceutical and Food Fields: Pharmaceutical Excipients and Food Additives

The magnesium hydroxide for pharmaceutical intermediates is used in antacids, laxatives, and food anticaking agents. The pharmaceutical-grade product has a purity ≥ 99% and extremely low heavy metal content. The clinical trial data of a pharmaceutical enterprise in 2025 showed that the antacid capsule containing 8% magnesium hydroxide had an acid-neutralizing capacity of 18mEq/g, an onset time ≤ 10min, and a continuous action time of 3 hours, and the gastrointestinal irritation rate was reduced by 40%; when used as a food anticaking agent, an addition amount of 0.5% can increase the fluidity of salt by 30%, meeting the standards of the Chinese Pharmacopoeia 2026 edition and FDA 21 CFR 184.1428.

1. Agricultural Field: Soil Amendment and Fertilizer Additive

In the improvement of acidic soil and the production of fertilizers, agricultural-grade magnesium hydroxide adjusts the soil pH value and provides magnesium elements. The purity of the agricultural-grade product ≥ 92%. The data of an agricultural experimental field in 2025 showed that applying 20kg of magnesium hydroxide per mu increased the pH value of acidic soil from 4.5 to 6.5, the magnesium element absorption rate of crops increased by 50%, and the wheat yield increased by 15%; when used as a compound fertilizer additive, it can extend the slow-release period of the fertilizer to 3 months, and the nutrient utilization rate is increased by 25%, meeting the NY/T 1110-2017 "Magnesium Oxide for Fertilizer" standard.

III. Product Advantages: Technical Highlights of Magnesium Hydroxide and Empirical Data in 2025

Based on the industry's actual measurements and application cases in 2025, the advantages of magnesium hydroxide in halogen-free flame retardancy, environmental friendliness, and compatibility have been further highlighted, showing excellent performance compared with similar materials:

1. High-Efficiency Halogen-Free Flame Retardancy and Smoke Suppression: Adapting to the Environmental Trend

The core advantage of magnesium hydroxide is halogen-free environmental friendliness and the synergy of flame retardancy and smoke suppression. The measured data in 2024 showed that when adding 50 parts of the halogen-free flame retardancy special product to PE materials, the oxygen index reached 30%, and the smoke density rating ≤ 40. The smoke density was reduced by 70% compared with halogen-based flame retardants, and no halogenated substances were released; compared with magnesium hydroxide, the decomposition temperature was 30°C higher, and there was no decomposition at a processing temperature of 200°C, and the flame retardancy stability was increased by 40%. After a cable enterprise applied it, the release amount of toxic gases during the combustion of low-smoke halogen-free cables was reduced by 80%, passing the EU CE certification, and the export volume increased by 50%.

1. High Adsorption and Neutralization Capacity: Improving Governance Efficiency

The environmentally friendly Magnesium Hydroxide special product has a specific surface area of 80m²/g and excellent adsorption capacity for pollutants such as phosphorus and heavy metals, which is 3 times that of traditional lime. The data of a wastewater treatment project in a chemical industrial park showed that when using magnesium hydroxide to treat phosphorus-containing wastewater, the treatment cost was reduced by 20% compared with the lime method, and the sludge production was reduced by 60%; in the stabilization of solid wastes, its treatment efficiency was increased by 50% compared with sodium hydroxide, and there was no risk of secondary pollution. After a solid waste disposal enterprise applied it, the harmless disposal cost of fly ash was reduced by 30%.

1. Good Dispersibility and Compatibility: Ensuring Product Performance

Through surface modification technologies such as silane and stearic acid, the dispersibility of magnesium hydroxide in polymer materials has been greatly improved. Scanning electron microscopy shows that the particle size of the modified product is evenly distributed without agglomeration. The application data of a plastic enterprise showed that the modified magnesium hydroxide increased the tensile strength retention rate of the PP material from 60% to 85% and the impact strength by 30%; the compatibility with the resin was increased by 40%, and there was no equipment wear problem during the processing, and the production scrap rate was reduced from 12% to 2%.

1. Multi-Field Adaptability: Reducing the Comprehensive Cost

Magnesium hydroxide is applicable in multiple fields such as flame retardancy, environmental protection, and pharmaceuticals, enabling "one material with multiple functions". After a comprehensive enterprise applied it, it was used for both plastic flame retardancy and wastewater treatment, reducing the variety of raw material purchases by 40% and the warehousing cost by 30%; in the project combining agriculture and environmental protection, the by-product of wastewater treatment can be recycled as a soil amendment, realizing the "governance - resource utilization" closed-loop, and the comprehensive benefit was increased by 50%.

IV. Industry Background and Market Demand Analysis: The Latest Trends in 2026

Looking at the industry background, from 2025 to 2026, the global magnesium hydroxide industry has shown a high growth trend driven by policies on halogen-free flame retardancy, strengthened environmental governance, and agricultural upgrading. At the policy level, China's "14th Five-Year Plan for Plastic Pollution Control Action Plan" compulsively promotes halogen-free flame retardant materials.