Molekula
Magnesium nitrate hexahydrate
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Magnesium nitrate hexahydrate is a water-soluble inorganic compound used in fertilizers, laboratory reagents, and as a source of magnesium in chemical synthesis. It is also employed in pyrotechnic formulations, in concentrating nitric acid, as a catalyst in petrochemical production, and as a sensitizer for lithographic printing plates. It appears as colorless to pale green crystals. CAS: 13446-18-9, Molecular formula: Mg(NO3)2 · 6H2O, Molecular weight: 256.41 g/mol. Store at ambient temperature. Signal word: Warning.
Molekula supplies Magnesium nitrate hexahydrate at ≥ 98% purity in 500 g packs, from £50.40 inc. VAT. It is in stock for same-day dispatch. Every batch ships with a certificate of analysis, and safety data sheets are available in 7 languages. Larger quantities, up to multi-tonne, are quoted on request.
Example image for illustration only. Other packaging and pack sizes are available.
Often bought together
Pricing & pack sizes
In stock — same-day dispatch
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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500 g — £42.00 per pack ex VAT · £50.40 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 crystalline powder |
| Cadmium (Cd) | ≤ 0.0001% |
| Iron (Fe) | ≤ 0.002% |
| Arsenium | ≤ 0.0001% |
| Mercury (Hg) | ≤0.00001% |
| Calcium (Ca) | ≤ 0.8% |
| Nickel (Ni) | ≤0.0015% |
| Zinc (Zn) | ≤ 0.0005% |
| Chromium (Cr) | ≤ 0.0001% |
| Sulphates (SO4)(2-) | ≤ 0.1% |
| Chlorine (Cl) | ≤ 0.1% |
| Assay as Mg (NO3) 2.6H2O | ≥ 98% |
| Assay Mg (NO3)2 | ≥ 57.5% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 5.1 |
| Packing Group | III |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Melting Point | 89 °C |
Source: PubChem CID 202877 (PAC Chemical Database)
Identification
| Property | Value |
|---|---|
| SKU | 25818207 |
| CAS Number | 13446-18-9 |
| IUPAC Name | magnesium;dinitrate;hexahydrate |
| Molecular Formula | Mg(NO3)2 · 6H2O |
| Molecular Weight | 256.41 |
| Exact Mass | 256.0241 |
| SMILES | [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].O.O.O.O.O.O.[Mg+2] |
| InChIKey | MFUVDXOKPBAHMC-UHFFFAOYSA-N |
| InChI | InChI=1S/Mg.2NO3.6H2O/c;2*2-1(3)4;;;;;;/h;;;6*1H2/q+2;2*-1;;;;;; |
| PubChem CID | 202877 |
| UN Number | UN1474 |
| REACH Code | Y110 |
| HTS Code | 2834295100 |
| Tariff Code | 2834298000 |
Safety & GHS
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Oxidizing
GHS03
-
Health Hazard
GHS07
-
Serious Health Hazard
GHS08
Hazard statements
- H272 May intensify fire; oxidizer
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
- H351 Suspected of causing cancer
Precautionary statements
- P210 Keep away from heat/sparks/open flames/hot surfaces - No smoking
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Russian, 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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- Dusicnan horecnaty
- H12MgN2O12
- Magnesium (II) nitrate, hexahydrate
- Magnesium dinitrate hexahydrate
- Magnesium Matrix Modifier
- Magnesium nitrate hexahydrate ACS grade
- Magnesium nitrate--water (1/2/6)
- MAGNESIUM(II) NITRATE (1:2), HEXAHYDRATE
- Mg(NO3)2.6H2O
- Nitric acid, magnesium salt, hexahydrate
Frequently asked questions
What is magnesium nitrate hexahydrate used for?
It is commonly used in fertilizers, as a reagent in chemical synthesis, and in the production of catalysts and pyrotechnic formulations.
What is the chemical formula and molecular weight?
The formula is Mg(NO3)2 · 6H2O with a molecular weight of 256.41 g/mol.
How should magnesium nitrate hexahydrate be stored?
It should be stored at ambient temperature, in a dry place, away from incompatible materials.
What grade is available?
The product is specified with an assay of at least 98% as Mg(NO3)2 · 6H2O, with defined limits for impurities such as heavy metals, sulphates and chlorine; other grades may be available upon request.
Can Molekula supply it in bulk?
Yes, Molekula can supply magnesium nitrate hexahydrate in bulk quantities—please contact sales for details.
What documentation comes with the order?
Each order includes a Certificate of Analysis and Safety Data Sheet (SDS) with the shipment.
Where can I buy Magnesium nitrate hexahydrate?
Directly from Molekula, which lists Magnesium nitrate hexahydrate in 500 g packs from £50.40 inc. VAT, with a certificate of analysis for every batch. Larger quantities are quoted on request. Molekula's offices: United Kingdom, France, Spain, Germany, Italy, United States and China.
Is Magnesium nitrate hexahydrate dangerous goods for shipping?
Yes. Magnesium nitrate hexahydrate ships as dangerous goods: UN1474, class 5.1, packing group III.
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.