Molekula
Molybdenum(VI) 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
Molybdenum(VI) oxide is a yellow to orange crystalline powder used as a catalyst, precursor in metallurgy, and in the production of molybdenum-based materials. It is available in high purity with a molecular formula of MoO3, molecular weight of 143.94 g/mol, and CAS number 1313-27-5. Stored at ambient temperatures, it carries a warning signal word due to its potential hazards. Molekula supplies Molybdenum(VI) 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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25 g — £29.50 per pack ex VAT · £35.40 inc. VAT
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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 | Grey powder |
| Water | ≤0.0005% |
| Water insoluble matter | ≤0.015% |
| Cadmium (Cd) | ≤0.0015% |
| Iron (Fe) | ≤0.0020% |
| Lead (Pb) | ≤0.0005% |
| Copper (Cu) | ≤0.0015% |
| Magnesium (Mg) | ≤0.0010% |
| Potassium (K) | ≤0.0080% |
| Nickel (Ni) | ≤0.0010% |
| Molybdenum (Mo) | ≥66.63% |
| Sodium (Na) | ≤0.002% |
| Aluminium (Al) | ≤0.0015% |
| Bismuth (Bi) | ≤0.001% |
| Molybdenum trioxide assay | ≥99.95% |
| Chlorine (Cl) | ≤0.05% |
| Phosphorous (P) | ≤0.005% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless or white yellow rhombic crystals |
| Odour | None |
| Melting Point | 795 °C |
| Boiling Point | 1155 °c, sublimes |
Source: PubChem CID 14802 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 32376934 |
| CAS Number | 1313-27-5 |
| IUPAC Name | trioxomolybdenum |
| EC Number | 215-204-7 |
| Molecular Formula | MoO3 |
| Molecular Weight | 143.94 |
| Exact Mass | 145.8901 |
| SMILES | O=[Mo](=O)=O |
| InChIKey | JKQOBWVOAYFWKG-UHFFFAOYSA-N |
| InChI | InChI=1S/Mo.3O |
| PubChem CID | 14802 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 28257000 |
| Tariff Code | 2825700090 |
Safety & GHS
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Health Hazard
GHS07
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Serious Health Hazard
GHS08
Hazard statements
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
- H351 Suspected of causing cancer
Precautionary statements
- P201 Obtain special instructions before use
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P308+313 IF exposed or concerned: Get medical advice/attention
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
- Molybdena
- Molybdenum oxide (MoO3)
- Molybdenum peroxide
- MOLYBDENUM TRIOXIDE
- Molybdic acid anhydride
- Molybdic anhydride
- Molybdic oxide
- Molybdic trioxide
- MoO3
- Natural molybdite
Frequently asked questions
What is Molybdenum(VI) oxide used for?
It is primarily used as a catalyst in chemical reactions, particularly in petroleum refining (hydrodesulfurization) and the oxidation of methanol to formaldehyde (as iron molybdate).
What is the chemical formula and molecular weight of Molybdenum(VI) oxide?
The formula is MoO3 and the molecular weight is 143.94 g/mol.
How should Molybdenum(VI) oxide be stored?
It should be stored at ambient temperature, away from moisture and incompatible materials.
What grade of Molybdenum(VI) oxide does Molekula supply?
We supply high-purity analytical grade, suitable for laboratory and industrial applications.
Can Molekula supply Molybdenum(VI) oxide in bulk?
Yes, we offer bulk quantities for industrial customers—please contact our sales team for pricing and availability.
What documentation comes with an order of Molybdenum(VI) oxide?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.
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.