Magnesium Hydroxide
CAS 1309-42-8 · Molecular formula Mg(OH)₂ · Appearance: white to off-white powder
Non-halogen flame retardant and fume-suppressant filler for polymers, cables, and wire and cable compounds.
Series overview
What sets our magnesium hydroxide apart
A surface-treated, low-agglomerate Mg(OH)₂ that disperses cleanly in polyolefins and EVA, delivering flame retardancy without halogens.
High thermal stability and low smoke generation help you meet fire-safety and environmental specifications.
Magnesium Hydroxide
Compare the grades on the two numbers that matter.
Guaranteed value —
Typical value —
—
On request
| Specifications | ZH-H1 | ZH-H2 | ZH-H3 | Flame Retardant Magnesium Hydroxide | Surface-Modified Magnesium Hydroxide | Food & Pharmaceutical Grade Magnesium Hydroxide | Industry-Specific Magnesium Hydroxide |
|---|---|---|---|---|---|---|---|
| Mg(OH)₂ (%) | On request | ≥ 99% | ≥ 99% | On request | On request | On request | On request |
| MgO (ignited basis) (%) | On request | On request | On request | On request | On request | On request | On request |
| CaO (%) | On request | On request | On request | On request | On request | On request | On request |
| Chloride (Cl-) (%) | On request | ≤ 0.35% | ≤ 0.5% | On request | On request | On request | On request |
| Iron (Fe) (%) | On request | On request | On request | On request | On request | On request | On request |
| Acid insoluble matter (%) | On request | ≤ 0.07% | ≤ 0.02% | On request | On request | On request | On request |
| Moisture (%) | On request | On request | On request | On request | On request | On request | On request |
| Loss on ignition (%) | On request | On request | On request | On request | On request | On request | On request |
| Specific surface area (m²/g) | On request | On request | On request | On request | On request | On request | On request |
| Particle size D50 (µm) | On request | On request | On request | On request | On request | On request | On request |
| Bulk density (g/ml) | On request | ≤ 0.36 g/ml | ≤ 0.37 g/ml | On request | On request | On request | On request |
| Whiteness (%) | On request | On request | On request | On request | On request | On request | On request |
| Surface treatment | On request | On request | On request | On request | On request | On request | On request |
| Decomposition onset (°C) | On request | On request | On request | On request | On request | On request | On request |
What Magnesium Hydroxide does in your formulation
Packing and storage
Packed in 25 kg bags or jumbo bags, with optional silane surface treatment to improve polymer compatibility.
Not sure which number matters?
Share your compound base and flame-retardancy target — we will recommend a grade and treatment.