Magnesium Carbonate
The hydrated form of MgCO₃, with a higher loss on ignition than the normal grade. Decomposes to MgO on firing, which is why it is used as a ceramic precursor — and its fine, bulky structure is why rubber and flame-retardant compounders use it as a reinforcing filler.
CAS 13717-00-5 · MgCO₃
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 basis (%) | On request | On request | On request |
| CaO (%) | On request | On request | On request |
| Chloride (Cl-) (%) | On request | On request | On request |
| Iron (Fe) (%) | On request | On request | On request |
| Acid insoluble matter (%) | On request | On request | On request |
| Loss on ignition (%) | On request | On request | On request |
| Bulk density (g/ml) | On request | On request | On request |
| Particle size D50 (µm) | On request | On request | On request |
| Moisture (%) | On request | On request | On request |
| Whiteness (%) | 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)
Specified where trace calcium, chloride and iron would show up in the fired body or the final formulation. The carbonate route to MgO for electronic ceramics, and a controlled magnesium source for fine-chemical use.
View detailsThe low-bulk-density, high-specific-volume form of MgCO₃: very fine, bulky, easy to disperse. Used for rubber reinforcement and as a carrier and anti-caking agent in food and pharmaceutical powders.
View detailsGeneral-purpose MgCO₃ for industrial filling and processing use.
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.