Molekula
Magnesium oxide
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 oxide is a white inorganic compound composed of magnesium and oxygen, widely used as an antacid, dietary supplement, and in the production of ceramics, glass, and construction materials. It also serves as a stabilizer in plastics and a flame retardant. Magnesium oxide has a CAS number of 1309-48-4, a molecular formula of MgO, and a molecular weight of 40.305 g/mol. It is stored at ambient conditions with no signal word required for safety classification. Molekula supplies magnesium oxide 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.
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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500 g — £93.00 per pack ex VAT · £111.60 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 | Solid |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Base |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | White, very fine powder |
| Odour | Odorless |
| Melting Point | 2825 °C |
| Boiling Point | 3600 °C |
| Density | 3.6 (relative, water = 1) |
| Water Solubility | 86 mg/L at 30 °C |
| Solubility (other solvents) | Soluble in acids and ammonium salt solutions |
| Vapour Pressure | 0 mmHg (approx) |
| Refractive Index | 1.7355 |
Source: PubChem CID 14792 (HSDB, ICSC, The National Institute for Occupational Safety and Health (NIOSH))
Identification
| Property | Value |
|---|---|
| SKU | 46111837 |
| CAS Number | 1309-48-4 |
| IUPAC Name | oxomagnesium |
| EC Number | 215-171-9 |
| Molecular Formula | MgO |
| Molecular Weight | 40.305 |
| Exact Mass | 39.98 |
| SMILES | O=[Mg] |
| InChIKey | CPLXHLVBOLITMK-UHFFFAOYSA-N |
| InChI | InChI=1S/Mg.O |
| PubChem CID | 14792 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 2519.90.5000 |
| Tariff Code | 2519901090 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
Documents
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
- Animag
- Anscor P
- Calcined magnesia
- Granmag
- Heavy magnesium oxide
- Magcal
- Magnesia
- Magnesium oxide (MgO)
- Marmag
- Seawater magnesia
Frequently asked questions
What is magnesium oxide commonly used for?
Magnesium oxide is widely used in construction (e.g., cement, bricks), as a supplement in animal feed, in pharmaceuticals (antacids), and as a refractory material in high-temperature applications.
What is the chemical formula and molecular weight of magnesium oxide?
The chemical formula is **MgO**, and the molecular weight is **40.305 g/mol**.
How should magnesium oxide be stored?
Store magnesium oxide in a cool, dry place at ambient temperature, ensuring the container is tightly sealed to prevent moisture absorption.
What grades of magnesium oxide does Molekula supply?
Molekula supplies **technical-grade** and **pharmaceutical-grade** magnesium oxide, depending on the application requirements.
Can Molekula supply magnesium oxide in bulk quantities?
Yes, we offer magnesium oxide in bulk quantities, with flexible packaging options (e.g., drums, bags) to meet large-scale production needs.
What documentation is provided with a magnesium oxide order?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability and compliance.
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.