HS 28273100

Magnesium Chloride

Magnesium Chloride is an inorganic magnesium salt with the formula MgCl₂, typically sold as the hexahydrate MgCl₂·6H₂O in the form of colourless flakes, prills, or a clear concentrated brine.

The salt is highly soluble in water, mildly hygroscopic, and delivers a sharp, slightly bitter mineral taste. It functions across three distinct industries: food, where it coagulates soy protein into tofu, infrastructure, where it manages ice and dust on roads, and nutrition, where it serves as a bioavailable source of elemental magnesium.

We source bulk Magnesium Chloride from top China manufacturers for our partners, working with several of them. The manufacturers are in Jiangsu and Guangxi. A smaller requirement can ship in a combined container with other ingredients.

Please send the grade you need, the volume and your destination port, and we will come back with a solution and a price.

or call +86-21-6858 0751

Packaging: 25 kg kraft paper bag with PE inner liner

ISO 9001
HACCP
Halal
Kosher

Specifications

Item	Specification
Appearance	Colourless to white flakes, prills or crystalline powder
Assay (as MgCl₂·6H₂O)	99.0-101.0%
Magnesium Chloride (as MgCl₂)	≥ 46.0%
Magnesium (as Mg)	≥ 11.8%
pH (5% solution)	4.5-7.0
Water-Insoluble Matter	≤ 0.05%
Sulfate (as SO₄)	≤ 0.5%
Bromide	≤ 0.5%
Ammonium	≤ 50 mg/kg
Heavy Metals (as Pb)	≤ 10 mg/kg
Lead	≤ 2 mg/kg
Arsenic	≤ 3 mg/kg
Total Plate Count	≤ 1000 CFU/g
Salmonella	Negative/25g

Common Markets Grades

Magnesium Chloride is graded by purity and by hydration state.

Food grade hexahydrate flake is the standard format for tofu manufacturing and for use as a firming agent. In Japan it is sold under the traditional name nigari, often made directly from seawater bittern after sodium chloride removal.

USP and Ph. Eur. pharmaceutical grade hexahydrate is the format used for oral supplements, topical magnesium oil concentrates, and intravenous electrolyte solutions, with controlled limits on sulphate, bromide, ammonium, and heavy metals.

Technical grade anhydrous MgCl₂ is produced for the electrolytic production of magnesium metal and as a Lewis-acid catalyst.

De-icing and dust-control grades go out as 28 to 35 percent aqueous brine or as 47 percent prills, with looser specifications on insolubles and colour.

Applications

Coagulant for silken and firm tofu, where Mg²⁺ ions cross-link soy glycinin and conglycinin proteins
Firming agent for canned vegetables, pickled products, and processed plant proteins
Mineral fortification in bottled waters, sports drinks, and meal replacements
Oral magnesium supplements in tablet, capsule, liquid, and effervescent formats
Topical magnesium oils, bath flakes, and dermal sprays for transdermal delivery claims
Intravenous and oral rehydration solutions in clinical and veterinary use
Winter road de-icing as a pre-wet on rock salt or as a direct anti-icing brine
Dust suppression on unpaved roads, construction sites, and mine haul roads
Concrete accelerator and component of Sorel-type magnesia cements for industrial flooring
Electrolyte feed for the Dow and IG Farben processes that produce primary magnesium metal
Drilling-fluid additive for shale stabilisation in oil and gas wells
Refrigerant brine for low-temperature secondary cooling loops

Brands Using Magnesium Chloride

Widely-distributed consumer products that list Magnesium Chloride on the ingredient label.

Brand names, product names and logos are the property of their owners. They appear here as published evidence that the ingredient is used, taken from the brand's own label or website. Their appearance is not an endorsement, and it does not mean the brand buys from us or from any manufacturer listed on this site.

China Manufacturers of Magnesium Chloride

Top Magnesium Chloride manufacturers in China.

Company names and logos are the property of the manufacturers themselves. They are listed here because our own directory records them as producing this ingredient. A listing is not an endorsement by them, and we do not represent them or speak on their behalf.

How We Help Source Magnesium Chloride

Direct Factory Sourcing
We run the whole process: selecting the manufacturer from the top Chinese food ingredient producers, negotiating the price, verifying quality, and coordinating the logistics. You deal with us instead of with several factories at once.
Original Packaging and Documents from the Manufacturer
The manufacturer sends your Magnesium Chloride out of its own factory in the original packing, through to your destination port. The COA, COO, MSDS, TDS and any certifications reach you from the manufacturer as well.
Free Samples and Lead Time
We send 100 to 500 g free for your own laboratory to test and you cover only the courier, usually within 2 to 3 working days. ETD is usually within 7 to 15 days once the order is confirmed, and we check that date against the factory's own manufacturing schedule before we give it to you.
Combined Shipment
We can load Magnesium Chloride together with other ingredients such as Sodium Acetate, Calcium Citrate and Sodium Lactate into one 20' FCL. If your quantity is small, we can also ship LCL.

Regulatory Status

Magnesium Chloride is approved for food use in essentially every regulated market.

In the European Union it carries the additive number E511, with quantum satis authorisation as a firming agent and stabiliser.

The U.S. Food and Drug Administration recognises the substance as GRAS under 21 CFR 184.1426, with specific listings as a firming agent, flavour enhancer, nutrient, and processing aid.

JECFA has reviewed magnesium salts as a group and assigned them acceptable status for use as food additives.

Pharmacopoeial monographs for the hexahydrate appear in the United States Pharmacopeia (USP), the European Pharmacopoeia (Ph. Eur.), and the Japanese Pharmacopoeia (JP). Halal and Kosher certification is routine for both the seawater-derived and synthetic grades.

Manufacturing Process

Magnesium Chloride Manufacturing Process

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Three industrial sources account for almost all commercial supply.

The dominant route is concentration of natural brines from seawater, salt lakes, and underground reservoirs. The Dead Sea, Great Salt Lake, China's Qaidam Basin, and bittern liquor left over from solar sea-salt operations are the largest single feedstocks. Stepwise evaporation precipitates sodium chloride first, then potash salts, leaving a magnesium-rich end liquor that is crystallised as the hexahydrate.

The carnallite route processes the natural mineral KMgCl₃·6H₂O, dissolving and selectively crystallising potassium chloride, then recovering magnesium chloride hexahydrate from the mother liquor.

The synthetic route reacts magnesium oxide or magnesium hydroxide with hydrochloric acid, followed by evaporation and crystallisation. This is the route most often used for pharmacopoeial grades, since starting-material purity can be tightly controlled.

Anhydrous MgCl₂ is produced by dehydrating the hexahydrate under a dry hydrogen chloride atmosphere, which prevents the hydrolysis to magnesium oxychloride that would otherwise occur on simple heating.