Magnesium Hydroxide (CAS 1309-42-8)

Product Overview

Magnesium hydroxide is an inorganic alkaline powder widely used as an environmentally friendly flame retardant, acid scavenger and smoke suppressant in plastics, rubber, cable compounds and industrial wastewater treatment. It offers high decomposition temperature, good thermal stability and low smoke, making it a popular halogen-free alternative to traditional flame retardant systems.

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Physicochemical Properties

(The above values are typical data from industrial production and can be adjusted according to your required grade and particle size specification.)

Applications

1. Halogen-Free Flame Retardant & Smoke Suppressant
   • Used in PVC cable compounds, PE/PP, EVA, rubber, thermosetting resins and engineering plastics.
   • Decomposes at high temperature to release water and absorb heat, diluting combustible gases and reducing smoke.
2. Industrial Wastewater & Flue Gas Treatment
   • Acts as an alkaline neutralizing agent and heavy-metal precipitant in acidic wastewater.
   • Used in desulfurization and denitrification systems as a magnesium-based alkaline source.
3. Chemical Intermediate & Catalyst Carrier
   • Raw material for magnesium salts (e.g. magnesium oxide, magnesium sulfate).
   • Carrier or additive in catalysts and ceramic formulations.
4. Paper, Coatings & Filler Applications
   • Functional filler in paper, coatings and inks to improve whiteness, opacity and flame resistance.
   • Used in certain rubber and elastomer formulations for improved mechanical properties and flame behavior.
5. Other Industrial Uses
   • Acid scavenger in polymer processing.
   • Additive for building materials, mineral composites and other environmental products.

Storage Conditions

• Store in a cool, dry and well-ventilated warehouse.
• Keep the bags tightly closed to avoid moisture absorption and contamination.
• Avoid direct sunlight and keep away from strong acids, ammonium salts and incompatible materials.
• Recommended storage temperature: 5–35 °C.
• Under proper storage conditions, typical shelf life is 24 months from production date; re-test before use if over the recommended period.

Safety Precautions

• Magnesium hydroxide is generally considered low-toxicity, but industrial handling rules should still be followed.
• Avoid dust generation; use local exhaust ventilation when charging or transferring the powder.
• Wear appropriate PPE: dust mask or respirator, safety goggles and protective gloves.
• In case of eye contact: rinse immediately with plenty of clean water for at least 15 minutes and seek medical advice if irritation persists.
• In case of skin contact: wash with water and soap; remove contaminated clothing.
• If inhaled: move the person to fresh air; get medical attention if respiratory irritation occurs.
• Spill handling: sweep or vacuum up the material carefully to avoid dust; collect into suitable containers for reuse or disposal according to local regulations.