Magnesium Carbonate
1. General Description
Molecular formula: xMgCO3·yMg(OH)2·zH2O 4MgCO3·Mg(OH)2·4H2O
CAS No.: 39409-82-0 12125-28-9
EC No.: 232-160-4
2. Applications
Food additives- Enrichment of Magnesium for various foods, Anti caking agent in the cooking salt/powdered drinks, Demolding agent in the manufacture of biscuits,Carbonate source in the soft drinks.
Cosmetics-Rheological agent moisture stabilizer in manufacture of soap.
Other industrial use.
3. Specifications
Standard: GB 25587-2010
| Appearance | White Powder | |
| Purity (MgO) | 40-44% | |
| Acid Insoluble （ HCl ） | 0.05% max. | |
| Calcium Oxide (CaO) | 0.6% max. | |
| Solubility Salt | 1% max. | |
| Chloride | 700ppm max | |
| Sulfate | 0.6%max | |
| Microbiology | C onform | |
| Arsenic （ As ） | 3ppm max. | |
| Iron(Fe) | 400ppm max. | |
| Lead(Pb) | 2ppm max | |
| Mercury | 1ppm max | |
| Bulk Density | Light | 0.1-0.4 |
| Heavy | 0.5-0.7 | |
4. Packaging:
Generally Magnesium Carbonate Basic is supplied in the following packaging:
– 20/25kg moisture-proof PP bags with inner PE bags.
5. Storage and Handling:
Protect packagings from damage and keep them well closed. Store in a cool, well – ventilated, dry and shaded area. Avoid inhalation, ingestion and contact with eyes and skin.
Magnesium Carbonate (MgCO₃) – Properties, Uses & Safety
Magnesium carbonate is an inorganic salt with the chemical formula MgCO₃, occurring naturally as minerals like magnesite and dolomite (mixed with calcium carbonate). It has wide applications in pharmaceuticals, sports, food, and industry.
Properties of Magnesium Carbonate
| Property | Details |
|---|---|
| Chemical Formula | MgCO₃ (anhydrous) / MgCO₃·xH₂O (hydrated forms) |
| Molar Mass | 84.31 g/mol (anhydrous) |
| Appearance | White, odorless, light powder |
| Solubility | Poor in water (12 mg/100 mL), soluble in acids |
| Melting Point | Decomposes at ~350°C (forms MgO + CO₂) |
| pH (in water) | ~10 (alkaline) |
| Common Hydrates | Trihydrate (MgCO₃·3H₂O), Pentahydrate (MgCO₃·5H₂O) |
Common Uses of Magnesium Carbonate
1. Pharmaceuticals & Supplements
- Antacid: Used in indigestion & heartburn relief (e.g., milk of magnesia).
- Magnesium Supplement: For treating magnesium deficiency.
- Tablet Binder: Helps hold pills together.
2. Sports & Fitness
- Gymnastics Chalk: Absorbs sweat, improves grip (used in weightlifting, rock climbing).
- Sports Drink Additive: Provides magnesium electrolytes.
3. Food Industry (E504)
- Anti-Caking Agent: Prevents clumping in powdered foods (salt, sugar, flour).
- Acidity Regulator: Used in baked goods & beverages.
4. Industrial Applications
- Rubber & Plastics: Filler material to improve durability.
- Fireproofing: Used in insulation and construction materials.
- Ceramics & Glass Manufacturing: Acts as a flux.
Safety & Side Effects
- Generally Recognized as Safe (GRAS) by the FDA in food.
- Overconsumption Risk: May cause diarrhea or laxative effects (similar to magnesium hydroxide).
- Inhalation Risk: Powder form may irritate lungs (wear a mask if handling large quantities).
Application
Usage:It mainly used as chemical reagents;reinforcing agent in rubber, fillers, also can be used for insulation, high-temperature fire insulation materials;
Manufacturing glass products; Play the light effect from the surface of Ceramic&Enamel ;
Used in magnesium production, shipbuilding and boiler manufacturing.
In the paint industry, as accessory pigments, paints, ink filler to increase the whiteness and opacity.
Package:
1. 25kg/bag or 1ton/bag, or as clients’ request;
2. Packed on pallet,1ton per pallet,20 pallets full filled in 1*20’FCL.
3. 7-15 working days to prepare the bulk production after we received prepayment.
Delivery
1. Sample order delivery within 24 hours, small order 7-15 working days, mass order 15-30 working days
2. Our daily output at about 200 tons,it can guarantee we delivery on time
3. Our company will choose the best delivery way according to your specific situation
Storage:
(1)Stored in a cool and dry well-closed container and in ventilated area,
(2)kept away from moisture and strong light or high temperature.
(3)Two years under well storage situation and stored away from direct sun light.
Our Service
1. Why Choose US:
We can ensure the products’ quality is high and stable! At the same time, we will be supporting you the Competitive price. We can ensure you receive the goods within delivery time. We would like to have the long-term cooperation with customers.
2. Could you provide the samples for free
Yes, the free sample is available! If you can offer courier account number to us,that would be better. Becase customers need to pay the freight.
3. How soon the sample/goods will be sent out
For samples, it’ll be sent out within 3~5 days. For goods, that will be 5~10 working days after received your payment.
4. May I choose the payment way
Yes, For your convenients, you can choose which you’re using. We still can accept T/T,DP,L/C, West Union.
5. Do you have the after-sale services
Of course! Perfect after-sale services! We are professional and any issues will be solved promptly.
FAQ
Q1: Are you a manufacture or trader?
A1: We are a Manufacture in China.
Q2: May I have a sample order?
A2: Yes ,we welcome sample order to test and check our quality.Contact Us and tell me your requirement of the product you want.We can provide free sample,you just provide us the freight collect.
Q3: What is your acceptable payment term?
A3: L/C,T/T,Western Union,Paypal.
Q4: How about the validity of the offer?
A4: Usually our offer is valid for 1 week. However, validity might vary between different products.
Q5: What documents you provide?
A5: Usually, we provide Commerical Invoice, Packing List, Bill of loading, COA, MSDS.Please let us know if you need additional documents.
Q6: What is loading port?
A6: Usually loading port is tianjin port,we also can ship from other ports if you need.
