Molekula
Magnesium chloride hexahydrate
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Magnesium chloride hexahydrate is a versatile inorganic compound, primarily used as a de-icer, dust suppressant, and in medical applications like magnesium supplementation. It also serves in industrial processes such as water treatment and as a raw material in the production of other magnesium compounds. Further documented applications include pulp and paper processing, textile manufacturing, adhesive formulations and wood preservative treatments. Magnesium chloride hexahydrate has the CAS number 7791-18-6, with the molecular formula MgCl₂·6H₂O and a molecular weight of 203.30 g/mol. It is stored at ambient temperatures and carries no signal word for hazard classification. Molekula supplies magnesium chloride hexahydrate from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Often bought together
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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100 g — £20.20 per pack ex VAT · £24.24 inc. VAT
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500 g — £29.50 per pack ex VAT · £35.40 inc. VAT
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1 kg — £50.90 per pack ex VAT · £61.08 inc. VAT
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5 kg — £191.10 per pack ex VAT · £229.32 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White crystal |
| Heavy metals | ≤ 0.001% |
| Identification | Conforms to reference |
| pH | 4.5 - 7.0 |
| Solubility | Totally dissolves |
| Assay | ≥ 99.0% |
| Appearance of Solution | Clear and colourless |
| Acidity / Alkalinity | Neutral |
| Water insoluble matter | ≤ 1.0% |
| Aluminium (Al) | ≤ 1mg/kg |
| Sulphates (SO4)(2-) | ≤ 0.5% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 29218779 |
| CAS Number | 7791-18-6 |
| IUPAC Name | magnesium;dichloride;hexahydrate |
| Molecular Formula | MgCl2 · 6H2O |
| Molecular Weight | 203.30 |
| Exact Mass | 201.9861 |
| SMILES | O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-] |
| InChIKey | DHRRIBDTHFBPNG-UHFFFAOYSA-L |
| InChI | InChI=1S/2ClH.Mg.6H2O/h2*1H;;6*1H2/q;;+2;;;;;;/p-2 |
| PubChem CID | 24644 |
| REACH Code | Y113 |
| HTS Code | 28273100 |
| Tariff Code | 2827310000 |
Safety & GHS
Precautionary statements
- P231+232 Handle under inert gas. Protect from moisture
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Chlorure de magnesium hydrate
- Cl2MgO6
- Magnesium chloride (MgCl2) hydrate (1:6)
- Magnesium chloride (MgCl2), hexahydrate
- Magnesium chloride--water (1/2/6)
- Magnesium chloride.6H2O
- Magnesium dichloride hexahydrate
- magnesium dichloride--water (1/6)
- magnesium(II)-chloride hexahydrate
- MgCl2.6H2O
Frequently asked questions
What is magnesium chloride hexahydrate commonly used for?
Magnesium chloride hexahydrate is widely used in industrial applications like dust control on roads, as a desiccant, in water treatment, and as a raw material for producing other magnesium compounds.
What is the chemical formula and molecular weight of magnesium chloride hexahydrate?
The chemical formula is **MgCl₂·6H₂O**, and the molecular weight is **203.30 g/mol**.
How should magnesium chloride hexahydrate be stored?
Store at **ambient temperature** in a cool, dry place, away from incompatible substances. Ensure containers are tightly sealed to prevent moisture absorption.
What grades or purity levels of magnesium chloride hexahydrate does Molekula supply?
Molekula supplies **technical-grade** magnesium chloride hexahydrate, suitable for industrial applications. Higher purity grades may be available upon request.
Can Molekula supply magnesium chloride hexahydrate in bulk quantities?
Yes, Molekula can supply magnesium chloride hexahydrate in **bulk quantities**, with packaging options tailored to your needs (e.g., drums, bags, or custom solutions).
What documentation comes with an order of magnesium chloride hexahydrate?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a packing list. Additional documentation, such as a Certificate of Conformity, may be provided upon request.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.