Light and heavy forms
Choose low bulk density light powder for absorbency and anti-caking, or dense heavy powder for easier handling, dosing and compression.
Specialty Chemical
Magnesium Carbonate — Manufacturer & Exporter from India
Light and heavy magnesium carbonate powder in food, pharma and industrial grades, made in Gujarat and supplied with batch test data for qualification.
Light (precipitated) powderHeavy (dense) powder
ISO 9001 certified processes
NABL-accredited lab testing
CoA, TDS & MSDS with every shipment
Export packaging worldwide
Overview
What is Magnesium Carbonate?
Magnesium carbonate is a white, odourless, low-abrasion inorganic powder used as a filler, carrier, anti-caking agent and functional additive. The commercial product is usually basic magnesium carbonate, a hydrated form that combines magnesium carbonate with magnesium hydroxide, and its assay is commonly expressed as MgO content.
Most grades are made by precipitation. A soluble magnesium salt reacts with a carbonate source under controlled conditions, and the precipitate is washed, filtered, dried and milled. The precipitation conditions decide the physical form: light magnesium carbonate is very fine and fluffy with a low bulk density, while heavy, or dense, magnesium carbonate has larger, compact particles that flow and handle more like a conventional powder.
Physical form drives performance. The high surface area and porosity of light material give strong absorbency, so it carries oils and flavours and keeps other powders free-flowing. In rubber it acts as a semi-reinforcing white filler that suits translucent compounds, and in paints and inks it contributes whiteness and flatting with low abrasion. On heating it decomposes to magnesium oxide, water and carbon dioxide, a property used in some fire-resistant and insulating formulations.
Obsidian Minerals manufactures magnesium carbonate in Gujarat in three grades: Food, Pharma and Industrial. Food and pharma grades are offered for regulated uses: IP, BP and USP conforming grades, and E504 conforming grades, are available on request, and customers remain responsible for confirming regulatory suitability in their market. All grades are made under ISO 9001 certified processes, tested in an NABL-accredited laboratory and shipped with an MSDS/SDS, Technical Data Sheet and batch Certificate of Analysis.
Magnesium Carbonate grades
Select a grade for its typical properties, applications, usage guidance and FAQs.
Magnesium Carbonate
Food Grade MgCO₃
Light, high-purity magnesium carbonate used as an anti-caking agent, flow aid and carrier, with E504 conforming grades available on request.
Food & Beverage Magnesium CarbonatePharma Grade MgCO₃
Light and heavy magnesium carbonate for pharmaceutical formulators, with IP, BP and USP conforming grades available on request.
Pharmaceuticals Magnesium CarbonateIndustrial Grade MgCO₃
A white, low-abrasion magnesium carbonate filler for rubber, paints, inks, insulation and construction products, in light and heavy forms.
Rubber & Coatings| Grade | Specification | Primary use | Link |
|---|---|---|---|
| Food Grade Magnesium Carbonate | On TDS | Food & Beverage | Specs |
| Pharma Grade Magnesium Carbonate | On TDS | Pharmaceuticals | Specs |
| Industrial Grade Magnesium Carbonate | On TDS | Rubber & Coatings | Specs |
From deposit to dispatch
- 01
Raw material selection and testing
- 02
Controlled precipitation (light or heavy form)
- 03
Washing and filtration
- 04
Drying, milling and sieving
- 05
QC testing and packing
Why source Magnesium Carbonate from Obsidian Minerals
Regulated-grade options
Food and pharma grades are supplied with a batch CoA; IP, BP, USP and E504 conforming grades are available on request.
Lab-verified consistency
Assay, calcium, iron, bulk density and particle size are checked in an NABL-accredited laboratory, giving QC teams documented data for every lot.
Where Magnesium Carbonate is used
Magnesium Carbonate — frequently asked questions
What is magnesium carbonate used for?
Magnesium carbonate is used as an anti-caking agent and carrier in food powders, as an excipient and magnesium source in pharmaceutical and nutraceutical products, and as a white, low-abrasion filler in rubber, paints, inks and insulation. Its use in food and pharmaceuticals is subject to local regulatory approval, and customers should verify suitability for each application and market.
What is the difference between light and heavy magnesium carbonate?
Both have similar chemistry, but they differ in particle structure. Light magnesium carbonate is fine, porous and very low in bulk density, which gives high absorbency and good anti-caking performance. Heavy magnesium carbonate is denser and more compact, so it flows better, takes up less volume and is easier to compress into tablets or meter into mixers.
Do you supply food and pharmaceutical grade magnesium carbonate?
Yes. We supply food and pharma grades with controlled assay, calcium, iron and acid-insoluble matter. IP, BP and USP conforming grades, and E504 conforming grades, are available on request. Please tell us which specification your market or registration references, and we will confirm which grade and supporting documents we can provide before you order.
Is magnesium carbonate the same as magnesium oxide?
No. Magnesium carbonate is a carbonate salt, while magnesium oxide is the oxide formed when the carbonate, or magnesium hydroxide, is calcined. Magnesium carbonate is softer, less reactive and used mainly as a filler, carrier or anti-caking agent. Magnesium oxide is used where reactivity is needed, for example as an acid acceptor in rubber. We supply both products.
How is magnesium carbonate packed and documented?
Magnesium carbonate is packed in 25 kg or 50 kg HDPE or paper bags, or in 1 MT and 1.2 MT jumbo bags, with custom or private-label packaging on request. Every shipment includes an MSDS/SDS, Technical Data Sheet and batch Certificate of Analysis, based on testing in our NABL-accredited laboratory.
Can I get a sample of magnesium carbonate?
Yes. Samples of each grade are available for laboratory and plant evaluation. Let us know the intended application, whether you need the light or heavy form, the specification you work to and your expected volume. We will send the sample with a Technical Data Sheet so your team can compare it with your current material.
What packaging options are available for Magnesium Carbonate?
Standard export packing is 25 kg or 50 kg HDPE / paper bags and 1 MT or 1.2 MT jumbo (FIBC) bags, palletised and shrink-wrapped on request. Custom and private-label packaging can be arranged for volume orders.
Do you provide MSDS and technical datasheets?
Yes. A Technical Data Sheet and MSDS are available for every grade, and each shipment is accompanied by a batch-specific Certificate of Analysis.
Request a quote
Interested in Magnesium Carbonate?
Tell us your application, preferred grade and volume. Our engineering team will recommend the right grade and send a datasheet, sample and quotation.
- Technical Data Sheet & MSDS
- Samples for qualification trials
- Bulk and recurring supply pricing