Magnesium Chloride Anhydrous Magnesium Dichloride · MgCl₂
The principal industrial precursor to metallic magnesium — and the workhorse de-icing, dust-control and oxychloride-cement salt used across the United States. Supplied at 99% minimum purity as a white to off-white crystalline solid, strongly hygroscopic and freely soluble in water.
Chelora Chemicals delivers magnesium chloride anhydrous to magnesium producers, de-icing formulators, drilling-fluid blenders and cement manufacturers across the United States, with a batch COA and SDS on every consignment.
- CAS Number
- 7786-30-3
- EC Number
- 232-094-6
- IUPAC name
- Magnesium dichloride
- Molecular formula
- MgCl₂
- Molecular weight
- 95.21 g/mol
- Melting point
- 714 °C
- Boiling point
- 1412 °C
- HS Code
- 2827.31
Note: anhydrous MgCl₂ is strongly hygroscopic and will absorb moisture from air to form hydrates. Keep containers tightly sealed and store in a dry area.
From brine & chloride salt to magnesium metal
Magnesium chloride anhydrous is one link in a chain we supply end to end. Every downstream stage below is a product on this site — follow the chain to the grade you actually need.
Co-applications: supplied directly as a de-icing and dust-control salt, a drilling-fluid component, and the chloride source in magnesium oxychloride cement.
What MgCl₂ is used for
Magnesium chloride anhydrous is a white to off-white crystalline solid, strongly hygroscopic and freely soluble in water. It is the dehydrated form of the chloride salt most commonly recovered from natural brine, seawater and evaporite mineral deposits, or produced synthetically from a magnesium-bearing feedstock and hydrochloric acid.
Its single largest industrial use is as the principal precursor to electrolytic magnesium metal. Alongside that it is the leading salt for low-temperature road de-icing and dust control on unpaved surfaces, a component of drilling fluids and magnesium oxychloride (Sorel) cement, a Lewis-acid catalyst, and a food-grade firming agent and flocculant in specialty applications.
Anhydrous vs. hydrate
- Anhydrous (MgCl₂) — this product. Melts at 714 °C, the form used as electrolytic feedstock for magnesium metal.
- Hexahydrate (MgCl₂·6H₂O). The naturally occurring, more readily available hydrated form, common in de-icing brine solutions.
- Rapid vs. slow heating of the hydrate. Rapid heating drives off water to give the anhydrous salt; slow heating instead causes partial hydrolysis toward magnesium oxide.
Handling character
Magnesium chloride anhydrous is not flammable and not regulated for transport, but is strongly hygroscopic and should be kept sealed and dry. Full hazard detail is in the Safety section below.
| Parameter | Typical value |
|---|---|
| Appearance | White to off-white crystalline solid or powder |
| Purity (MgCl₂) | 99% min |
| Moisture | Per producer specification |
| Form | Flake, granule or powder on request |
Important: the figures above are indicative of commercial material and are offered for planning only. The batch certificate of analysis is the governing document.
| Property | Value |
|---|---|
| Physical state | White to off-white crystalline solid, hygroscopic |
| Melting point | 714 °C |
| Boiling point | 1412 °C |
| Density | 2.32 g/cm³ |
| Water solubility | ~540 g/L (20 °C); freely soluble in ethanol |
| Flammability | Not flammable |
Physical constants compiled from public reference data for CAS 7786-30-3 and rounded for readability. Treat them as orientation, not as a specification.
Where our customers put it to work
From magnesium metal production to winter road maintenance, drilling fluids and construction cement.
Magnesium metal production
The principal precursor to electrolytic magnesium metal, with chlorine gas as a co-product of the reduction reaction.
- Feeds our Raw Metals range
- Feeds Master Alloys
- Technical desk review on request
Road de-icing & anti-icing
Used for low-temperature de-icing of highways, sidewalks and parking lots, applied by anti-icing, prewetting or direct spreading.
- Effective at lower temperatures than rock salt
- Less damaging to concrete than calcium chloride
Dust control
Applied to unpaved roads and construction sites to suppress airborne particulate.
- Unpaved road stabilisation
- Construction-site dust suppression
Drilling fluids
A component of oilfield drilling fluid formulations.
- Oilfield chemical blends
- Full documentation supplied
Oxychloride cement & construction
The chloride source in magnesium oxychloride (Sorel) cement, used in flooring, panels and fire-resistant construction materials.
- Sorel cement chemistry
- Documented batch traceability
Catalyst & specialty grades
Used as a Lewis-acid catalyst, a component in polypropylene catalyst systems, a flocculant in water treatment, and a food-grade firming agent (E511) in specialty applications.
- Research & process-scale quantities
- Specialty purity on request
Delivered to US plants and depots
We ship magnesium chloride anhydrous to nominated delivery points across the United States. The regions below are destinations we serve — Chelora Chemicals is a sourcing and supply partner, not a US manufacturer, and does not hold US stock.
Gulf Coast
The largest US chemical cluster, and a common entry point for bagged and bulk consignments, including drilling-fluid blenders.
- Houston & Galveston, TX
- New Orleans & Baton Rouge, LA
- Mobile, AL
Northeast
Container and bulk delivery into the mid-Atlantic and New England winter road-maintenance market.
- Newark & Elizabeth, NJ
- Philadelphia, PA
- Boston, MA
Southeast
Port-side delivery for the Carolinas, Georgia and Florida construction and cement plants.
- Savannah, GA
- Charleston, SC
- Jacksonville, FL & Norfolk, VA
Midwest & Great Lakes
Inland rail and truck forwarding to the industrial Midwest — one of the largest US markets for winter road de-icing.
- Chicago, IL
- Detroit, MI
- Cleveland & Columbus, OH
West Coast
Pacific routing for West Coast formulators and magnesium producers.
- Los Angeles & Long Beach, CA
- Oakland, CA
- Seattle & Tacoma, WA
Southwest & Mountain
Inland delivery to interior states and dust-control markets, forwarded from the Gulf or Pacific gateway.
- Dallas–Fort Worth, TX
- Phoenix, AZ
- Denver, CO
Importing into the United States
Magnesium chloride anhydrous is a TSCA-regulated chemical substance. Under TSCA section 13 the importer of record, or its authorised agent, must certify to US Customs and Border Protection that each shipment either complies with TSCA or is not subject to it. We confirm the substance's TSCA Inventory status and agree in writing who files that certification before the first consignment moves.
Which party carries that duty follows the Incoterm. On FOB, CFR or CIF terms it is usually the US buyer; on DDP terms it can be the seller or its agent. Safety data sheets and labels are supplied to OSHA's updated Hazard Communication Standard. The product is not classified as a dangerous good for DOT, IMDG or IATA transport, which simplifies routing, but we still confirm and document the correct shipping description for your consignment.
| Item | How it works |
|---|---|
| Delivery points | Any nominated US plant, warehouse or port of discharge |
| Incoterms quoted | FOB · CFR · CIF · DDP |
| Importer of record | Agreed in writing before the first shipment |
| TSCA certification | Section 13 positive certification filed at entry |
| Documentation | Batch COA, SDS, packing list, certificate of origin |
| Pack formats | Bags, FIBC jumbo bags or bulk |
Note: regional coverage describes where we deliver, not where we hold inventory. Lead time depends on producer scheduling and ocean transit to your nominated US port — we confirm both in the quotation.
How we supply magnesium chloride anhydrous
Chelora Chemicals is a supplier and sourcing partner, not a manufacturer. Purity, moisture and particle form decide whether a lot performs cleanly as electrolytic feedstock or in de-icing and dust-control blends — that shapes how we select producers on this line.
We place your order with whichever qualified producer best matches your required grade, your price point and your delivery window, and confirm US import requirements before booking.
We keep a second qualified source on this line, so a single-plant disruption never becomes your production problem.
- Purity confirmed before we quote. Assay is checked against your required specification, not just the headline purity.
- TSCA status and import certification settled first. We confirm Inventory status and agree who files the section 13 certification before the first shipment.
- Moisture control managed end to end. Packing and liner selection matched to the product's hygroscopic nature.
- Batch traceability to the producing plant. Full chain of custody documentation on request.
- One desk for the whole chain. Order magnesium chloride alongside calcium chloride, raw metals and master alloys.
- Grade matched to your process. De-icing, technical and electrolytic-feed grades quoted against the right specification.
Bagged, drummed or supplied in bulk
Lined bags, jumbo bags or bulk — tell us your preferred format and we will quote and classify to it.
25 kg & 50 kg lined bags
PP-woven or multi-wall paper bags with a polyethylene inner liner to hold back moisture.
500 kg & 1000 kg jumbo bags
Liner-fitted bulk bags for plants handling material by hoist or bag-tip station.
Fibre & HDPE drums
Sealed drums where a rigid, stackable pack suits your warehouse and handling route.
Incoterms to suit you
Quoted on the Incoterm your purchasing team works to, with documentation filed before booking.
Trial / sample quantities
Small packs dispatched for process qualification before a commercial order is placed.
Hygroscopic and not flammable — handle accordingly
Magnesium chloride anhydrous is generally not classified as hazardous under GHS, though it is strongly hygroscopic and dust exposure can be irritating. The summary below is orientation only — the safety data sheet supplied with your specific batch is the authoritative document, as classification and labelling can vary between suppliers.
Classification notes
—Most supplier SDS classify anhydrous MgCl₂ as not hazardous, with no GHS signal word required.H315Some SDS note skin irritation from prolonged dust contact.H319Some SDS note eye irritation from dust exposure.H335Some SDS note possible respiratory irritation from dust.
Dust exposure. Fine dust may cause mechanical and mild irritation to eyes, nose, throat and lungs. When heated to decomposition it emits irritating fumes, including hydrogen chloride. Confirm your site's obligations with your EHS team.
Storage
Store in closed, tightly sealed containers in a cool, dry, well-ventilated area, away from excess heat. The product is hygroscopic and will absorb atmospheric moisture if left exposed, eventually forming hydrates or a saturated solution.
Handling
Avoid dust formation where practical, use standard dust control and eye protection, and keep away from moisture ingress during storage and transfer.
Transport
Magnesium chloride anhydrous is not regulated for DOT, TDG, IATA or IMDG transport under current SDS classifications. We confirm the exact shipping description for your specific shipment and destination regardless.
Every batch, documented
We verify documentation before dispatch so there are no surprises at your incoming-goods bench.
Specification agreed
Purity, moisture and particle form confirmed against your process requirement before order placement.
Producer batch testing
The producing plant tests each batch against the agreed specification before release.
Documentation review
COA, SDS and TSCA certification data checked by our desk before the shipment is booked.
Traceable dispatch
Each shipment is traceable to its producing batch, with full chain-of-custody records on request.
How it is made
Magnesium chloride is recovered from natural brines, seawater and evaporite mineral deposits such as bischofite, or produced synthetically by reacting a magnesium-bearing feedstock with hydrochloric acid.
The resulting solution is dehydrated under controlled conditions to the anhydrous salt — rapid heating drives off the water of crystallisation, while slow heating instead risks partial hydrolysis toward magnesium oxide.
Anhydrous MgCl₂ is then electrolysed to give metallic magnesium, with chlorine gas recovered as a co-product, feeding our Raw Metals and Master Alloys ranges, or supplied directly as feedstock to de-icing, cement and drilling-fluid formulators.
We do not publish operating process parameters here; this is background only. Full technical documentation accompanies every shipment, and any process-specific detail you need is best confirmed directly with our technical desk.
| Chemical family | Inorganic alkaline-earth metal chloride |
|---|---|
| Functional group | Ionic Mg²⁺ / Cl⁻ chloride salt |
| Reactivity | Strongly hygroscopic; electrolysed to Mg metal + Cl₂ |
| Upstream | Natural brine / seawater, or hydrochloric acid |
| Downstream | Raw Metals, Master Alloys |
| Also used in | De-icing, dust control, drilling fluids, oxychloride cement |
The rest of the chloride & metal range
Related inorganic chloride salts and the metal-production products magnesium chloride feeds into — all supplied from the same desk.
Magnesium chloride anhydrous, answered
What is magnesium chloride anhydrous used for?
What is the difference between magnesium chloride anhydrous and the hexahydrate?
Is magnesium chloride anhydrous hazardous?
What grade and purity do you supply?
What packing do you offer?
Do you supply magnesium chloride anhydrous in the United States?
Who is the importer of record for US shipments?
What is magnesium chloride anhydrous converted into downstream?
What documentation comes with each shipment?
Do you manufacture this yourself?
Get a quote on magnesium chloride anhydrous
Send us your required grade, pack size, US delivery point and Incoterm. We will come back with a firm quote, lead time and full documentation — and can price the related chloride-salt and raw-metal grades in the same enquiry.