Product Details
| Product Name: Magnesium Carbonate | CAS No.: 546-93-0 |
| EC-No.: 208-915-9 | Min. Order: 1ton |
| Purity: 99% | Supply Ability: 1000T/M |
| Release date: 2025/11/04 |
Magnesium Carbonate
CAS No:
Anhydrous: 546-93-0
Basic Magnesium Carbonate: 39409-82-0
Molecular Formula: MgCO₃ (or basic form: (MgCO₃)₄·Mg(OH)₂·5H₂O)
Molecular Weight: 84.31 g/mol (anhydrous)
1. Product Description
Magnesium carbonate is a white, odorless, tasteless, lightweight powder. It is practically insoluble in water but dissolves in dilute acids with effervescence, releasing carbon dioxide. It is used as a magnesium source, filler, desiccant, anti-caking agent, and antacid.
2. Specifications – Industrial / Technical Grade
| Item | Specification / Typical Value | Notes |
|---|---|---|
| Appearance | White, fine or granular powder | Visual |
| Assay (as MgCO₃) | ≥ 96.0 % | Gravimetric |
| Magnesium Oxide (MgO) | ~40 – 42 % | ICP |
| Moisture (LOD 105 °C) | ≤ 3.0 % | Oven dry |
| Water-Insoluble Matter | ≤ 0.1 % | Filtration |
| Iron (Fe) | ≤ 0.02 % | ICP |
| Heavy Metals (as Pb) | ≤ 20 ppm | ICP |
| Loss on Ignition | Consistent with theoretical value (CO₂ release) | Gravimetric |
| Bulk Density | Light grade: 0.1 – 0.3 g/cm³ | Typical |
| Solubility | Insoluble in water; effervesces in acids | Qualitative |
Typical Applications:
Rubber and plastic filler, fireproofing, ceramics, catalyst carrier, drying agent.
3. Specifications – Food / Pharmaceutical Grade (USP / FCC / EP)
| Item | Specification / Typical Value | Reference |
|---|---|---|
| Appearance | White, odorless, light powder | USP / FCC |
| Identification | Positive for magnesium and carbonate | USP |
| Assay (as MgCO₃) | Equivalent to 40.0 – 43.5 % MgO | USP |
| Loss on Drying | ≤ 2.0 % | USP |
| Acid-Insoluble Substances | ≤ 0.05 % | USP |
| Chloride (Cl⁻) | ≤ 0.05 % | USP |
| Sulphate (SO₄²⁻) | ≤ 0.3 % | USP |
| Iron (Fe) | ≤ 0.02 % | USP |
| Arsenic (As) | ≤ 2 ppm | ICP |
| Lead (Pb) | ≤ 2 ppm | ICP |
| Heavy Metals (as Pb) | ≤ 20 ppm | USP <231> |
| Solubility Test | Dissolves in dilute HCl with effervescence | USP |
| Microbiological Quality | Total plate count ≤ 10³ cfu/g; Pathogens negative | GMP / FCC |
Typical Applications:
Antacid and laxative formulations
Magnesium nutritional supplements
Anti-caking agent (E504) in food processing
Desiccant for salt, sugar, powders
4. Physical & Chemical Properties
Appearance: White, very light, porous powder
pH (10 % slurry): 9.0 – 10.5
Bulk Density: Light 0.1–0.3 g/cm³, heavy 0.4–0.6 g/cm³
Solubility: Practically insoluble in water; soluble in dilute acids with CO₂ evolution
Decomposition: Upon strong heating, converts to MgO + CO₂
5. Storage & Handling
Store in a cool, dry place, in tightly closed container
Protect from moisture and contamination
Minimize dust during handling (use PPE if necessary)
Follow GMP / HACCP protocols for food and pharma applications
6. Packaging
Industrial Grade: 25 kg kraft paper or woven bags, jumbo bags available
Food / Pharma Grade: 25 kg fiber drums or multi-layer paper bags with polyethylene liner
For more information, please visit this website:https://www.khonorchem.com
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China- Since: 2025-04-07
- Address: C-309, No. 12 Yuzhou S. Rd, Haizhou, Lianyungang, Jiangsu, China