Magnesium chloride
A highly soluble inorganic salt used for health supplementation, industrial applications, and road de-icing
Magnesium Chloride
- Product Name: Magnesium chloride hexahydrate
- CAS Number: 7791-18-6
- Molecular Formula: MgCl2·6H2O
- Types: Industrial Grade, Food Grade, Pharmaceutical Grade
- Appearance: white crystal or flakes
- Packing: 25kgs/bag
- Other Names: Magnesium dichloride, Magnesii chloridum, Magnesium dichloridehexahydrate
Magnesium chloride is available in both anhydrous (CAS No.: 7786-30-3) and hydrated forms. HOO CHEMTEC mainly supplies magnesium chloride hexahydrate (MgCl₂·6H₂O), CAS 7791-18-6, in industrial, food, and pharmaceutical grades.
Magnesium Chloride Specification
| ITEMS | SPECIFICATIONS |
| MgCl2 | 46.0%min |
| Calcium | 0.15%max |
| Sulphate | 1.0%max |
| Alkali metal (chloride) | 0.5%max |
| Water Insoluble | 0.1%max |
| Color(APHA) | 50 |
| ITEMS | SPECIFICATIONS |
| MgCl2.6H2O | 99%min |
| Calcium | 0.1%max |
| Sulphate | 0.4%max |
| Lead(Pb) | ≤1ppm |
| Water Insoluble | 0.1%max |
| Color(APHA) | 30 |
| Arsenic(As ) | ≤0.5ppm |
| NH4 | ≤50ppm |
| ITEMS | SPECIFICATIONS |
| Assay (MgCl2) /% | 98.0~101.0 |
| Arsenic /% | ≤0.0002 |
| Calcium (Ca) /% | ≤0.1 |
| Bromides /% | ≤0.05 |
| Aluminium /% | ≤0.0001 |
| Iron (Fe) /% | ≤0.001 |
| Sulfate (SO4) /% | ≤0.005 |
| Heavy metal (Pb) /% | ≤0.001 |
| Potassium (K)/% | ≤0.05 |
| water /% | 51.0%~55.0% |
| Bactrial endotoxins | ≤0.25EU/mg |
How to Choose Different Grade Magnesium Chloride?
Industrial Grade: Used for de-icing, dust control, and construction. Lower purity with higher impurities allowed (sulfates up to 2.8%), and no strict limits on heavy metals like lead or arsenic.
Food Grade: Meets FCC (Food Chemicals Codex) or E511 standards. Used as a firming agent in tofu, a coagulant, and a magnesium supplement in foods. Strict limits: lead ≤1 mg/kg, arsenic ≤0.5 mg/kg, sulfates ≤0.4%.
Pharmaceutical Grade: Meets USP, BP, EP, or JPC pharmacopeia standards. Used in medicines, dialysis solutions, and as an excipient. Highest purity (98-101%) with extremely low heavy metals (lead ≤0.0002%, arsenic ≤0.0002%) and microbial control.
How to Choose: Pick Industrial for road de-icing or construction; pick Food Grade for food processing, tofu, or dietary supplements; pick Pharmaceutical Grade for medicines, injectable solutions, or applications requiring the highest purity and safety.
Key Indicator: For all food/pharma applications, always request the Certificate of Analysis (CoA) to confirm purity levels and impurity limits specific to your required grade.
Magnesium Chloride for Sale
| Feature | Flake | Crystal |
| Physical Property | Industrial-grade hexahydrate typically contains about 46% MgCl₂ on an anhydrous MgCl₂ basis. | Typically ≥99% MgCl₂·6H₂O, depending on grade and specification. |
| Dissolution Rate | Dissolves moderately, suitable for bulk mixing | Dissolves quickly and uniformly, ideal for precise applications |
| Primary Applications | • De-icing and anti-icing (roads, airports) • Dust control and soil stabilization • Construction (Sorel cement, magnesia binders) • Industrial wastewater treatment | • Food-grade coagulant (tofu, nigari) • Pharmaceutical and supplement formulations • High-purity chemical synthesis • Premium bath salts and therapeutic products |
| Storage & Handling | Less sensitive to moisture, easier to store in bulk | Hygroscopic, requires airtight, moisture-proof packaging |
Key Advantages of Magnesium Chloride:
Effective Deicing Performance: Magnesium chloride lowers the freezing point of water and is widely used for ice and snow control in cold-weather applications.
High Purity Options Available: We supply both industrial flake for cost-effective bulk use and high-purity crystal (99%+) for food, pharmaceutical, and sensitive industrial applications — all with strict quality control.
Fast & Efficient Dissolution: Our crystal form dissolves quickly and uniformly, ensuring consistent performance in liquid deicing brines and industrial processes without residue or clogging.
Versatile & Easy to Handle: Available in both flake and crystal forms to suit your process — flakes for bulk spreading and blending, crystals for precise dosing and high-purity formulations. Flexible packaging options available (25kg bags, jumbo bags, bulk).
What is Magnesium Chloride Used for?
Magnesium chloride is a versatile inorganic salt used across several commercial and industrial applications. Its hygroscopic properties, high water solubility, and availability in flakes, granules, and other forms make it suitable for bulk industrial use.
1. Deicing and Snow Melting:
Magnesium chloride is widely used as a deicing and anti-icing agent for roads, highways, parking areas, and other surfaces during winter. Magnesium chloride flakes and granules can help melt ice and reduce ice bonding, making them suitable for road maintenance and winter service applications.
2. Dust Control:
Magnesium chloride is used to suppress dust on unpaved roads, mining roads, construction sites, industrial yards, and other high-dust areas. Its hygroscopic properties allow it to attract and retain moisture, helping stabilize road surfaces and reduce airborne dust.
3. Industrial Manufacturing:
Magnesium chloride is used as a raw material and processing aid in various industrial applications, including magnesium-based materials, oxychloride cement, chemical processing, and other manufacturing processes.
4. Oilfield and Drilling Applications:
Magnesium chloride can be used in drilling and completion fluids and other oilfield applications where magnesium chloride-based brines are required.
5. Agricultural and Fertilizer Applications:
Magnesium chloride can be used as a magnesium source in selected agricultural and fertilizer formulations. The appropriate grade and application rate depend on the specific crop, formulation, and local requirements.
6. Other Commercial Applications:
Depending on the grade and specification, magnesium chloride is also used in areas such as textile processing, specialty chemical formulations, and other industrial applications.
FAQ of Magnesium Chloride
Magnesium chloride hexahydrate is a hydrated form of magnesium chloride with the chemical formula MgCl₂·6H₂O and CAS Number 7791-18-6. It contains six molecules of water of crystallization and is commonly supplied as white or colorless flakes or crystals. FCC describes magnesium chloride hexahydrate as hygroscopic and very soluble in water.
Anhydrous magnesium chloride has the formula MgCl₂ and CAS Number 7786-30-3, while magnesium chloride hexahydrate has the formula MgCl₂·6H₂O and CAS Number 7791-18-6. They have different molecular weights and water contents and may be selected for different applications. HOO CHEMTEC mainly supplies magnesium chloride hexahydrate.
Magnesium chloride should not be considered completely harmless to concrete. Like other chloride-based deicing materials, it can contribute to concrete deterioration under certain conditions. Research has shown that MgCl₂ can react with cementitious materials, while EPA guidance notes that magnesium chloride can increase concrete flaking. Proper dosage, application, and surface conditions should therefore be considered.
HOO CHEMTEC supplies magnesium chloride for bulk B2B applications, including industrial, deicing, dust control, food, and other applications according to the required grade and specification. Contact us with your required grade, physical form, quantity, packaging, and application for product and shipping information.
Every shipment includes Certificate of Analysis (CoA) confirming purity, heavy metal limits, and key specifications. Food-grade meets FCC/E511 standards; pharmaceutical-grade meets USP/EP standards. SGS certification available upon request.
No. Magnesium chloride hexahydrate is not regulated as dangerous goods under UN transport regulations . Shipping is straightforward with standard documentation .
Yes. We produce Magnesium Chloride in our own facility and test every batch in our lab. You receive a Certificate of Analysis (CoA) with each shipment confirming purity, appearance, and specifications. Our quality is consistent — batch after batch, year after year.
Packaging specifications: 25 kg/bag, or as per customer requirements.
Store Magnesium Chloride Hexahydrate in a cool, dry place in tightly sealed containers to prevent moisture absorption and caking, with a shelf life of up to 24 months.
Magnesium Chloride Suppliers - Hoo Chemtec
HOO CHEMTEC: Your Trusted Magnesium Chloride Partner
We are a direct manufacturer with annual production capacity exceeding 50,000 metric tons of high-purity Magnesium Chloride Hexahydrate. Our fully automated facility operates 24/7, delivering consistent quality to customers across 40+ countries worldwide.
Unmatched Product Quality: Our crystal form achieves purity ≥99.5% , meeting the strictest USP and FCC standards for food and pharmaceutical applications. Every batch is tested in our ISO-certified lab — heavy metals below 5 ppm, sulfates below 0.2%, and zero microbial contamination for pharmaceutical grades. We provide Certificate of Analysis with every shipment.
Superior Deicing Performance: Our magnesium chloride outperforms traditional rock salt in every metric — effective down to -32°C , 40% less corrosive to concrete and vehicles, and 60% less damaging to roadside vegetation. Used by major airports and highway authorities across North America and Europe.
Global Supply Chain Excellence: We ship over 2,500 tons monthly , with dedicated export warehouses in major Chinese ports. For liquid solutions, we offer 1,250kg IBCs (22.5 MT per container). For solids, 25kg moisture-proof bags (25 MT per 20ft container). Our dangerous goods team handles all hazardous documentation — no delays, no complications.
Certified & Compliant: Our facility holds SGS, ISO 9001, and REACH registration. We provide full traceability from raw material sourcing to final packaging. Food-grade meets E511 standards. Pharmaceutical-grade meets USP, BP, and EP pharmacopeias.
Free Samples & Technical Support: Try before you buy — free samples available for all grades. Our in-house chemists provide free formulation advice, dosage optimization, and troubleshooting support. Join hundreds of satisfied customers who trust HOO CHEMTEC for quality, consistency, and on-time delivery.
