Magnesium Oxide
Our highest-assay magnesium oxide: 99.7% MgO minimum, with CaO, chloride and iron held low enough for electronic ceramics and soft magnetic ferrite. Choose it when trace impurities, not reactivity, are the risk.
CAS 1309-48-4 · MgO · ZH-V2
Minimum order quantity, lead time and packing depend on the grade and the order size — confirm them with us on an inquiry.
Full specification in the batch TDS
What you see above is what we publish openly. The complete parameter set — including the values still marked to be confirmed — is issued with the batch technical data sheet. Download the current TDS, or ask us for the full specification and the latest certificate of analysis.
| Specifications | Guaranteed value | Typical value | |
|---|---|---|---|
| MgO (%) | On request | ≥ 99.7% | On request |
| CaO (%) | On request | On request | On request |
| Chloride (Cl-) (%) | On request | ≤ 0.03% | On request |
| Sulfate (SO4 2-) (%) | On request | On request | On request |
| Iron (Fe) (%) | On request | On request | On request |
| Acid insoluble matter (%) | On request | ≤ 0.03% | On request |
| Loss on ignition (%) | On request | On request | On request |
| Specific surface area (m²/g) | On request | On request | On request |
| Particle size D50 (µm) | On request | On request | On request |
| Bulk density (g/ml) | On request | ≤ 0.38 g/ml | On request |
| Sieve residue (%) | On request | On request | On request |
Cells marked Values marked "On request" are grade-specific; our technical team issues them with the full data sheet.
25 kg multi-wall kraft bags with PE inner liner, palletised
Store sealed, dry, off the floor, in delivery order. Magnesium compounds pick up moisture and CO₂ from air.
Full Product Catalogue
Magnesium Oxide Grade Table
Magnesium Hydroxide Grade Table
Magnesium Carbonate Grade Table
Packing & Storage Guide
Sample Certificate of Analysis (example)
A 99.5% high purity magnesium oxide for applications that need purity and reactivity together — rubber vulcanisation, pharmaceutical and food formulations, fine-chemical synthesis. Move to ZH-V2 when iron and calcium become the constraint.
View detailsHigh-activity magnesium oxide with a specific surface area of at least 175 m²/g. A high-functionality fine inorganic material: adsorbs more, cures faster and reinforces more per kilogram than a dense grade.
View detailsActive magnesium oxide at 150 m²/g — one step below ZH-M600 on reactivity, one step above it on bulk density and handling. Choose it when 175 m²/g makes the powder too dusty or too fast for the line.
View detailsIt is a vulcanising agent and a vulcanisation activator — not an accelerator and not a filler. MgO controls scorch time, raises crosslink density and neutralises the acidic by-products of vulcanisation. If you dose it as if it were a filler, the compound will not cure the way your formulation expects.
Bulk density. Light grades have low bulk density and high specific surface area — they react faster and occupy more volume per kilogram. Heavy grades are dense and free-flowing. Light is the conventional choice for rubber; heavy suits technical ceramics and volume-limited processes. A container of light material fills by volume long before it fills by mass, so quote by tonne and plan by cubic metre.
Active MgO has a high specific surface area — ZH-M600 runs at 175 m²/g minimum and ZH-V150 at 150 m²/g. Specify it when reactivity is what your formulation is short of: adsorbents for harmful gases, electronic components, inks, and rubber or plastics where it functions as both filler and reinforcing agent. If the constraint is purity rather than reactivity, ZH-V2 or ZH-V3H is the right choice instead.
Minimum order quantity, lead time and packing depend on the grade and the order size — confirm them with us on an inquiry.