Molekula
Phosphorus pentoxide
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
Phosphorus pentoxide is a powerful desiccant and reagent used in organic synthesis and industrial processes requiring strong drying agents. It is highly hygroscopic and reacts vigorously with water. Available in powder or granular form, it has a molecular weight of 141.94 g/mol, a molecular formula of P₂O₅, and a CAS number of 1314-56-3. Store at ambient temperatures. Handle with care due to its corrosive and hazardous nature. Molekula supplies Phosphorus pentoxide 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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1 kg — £57.00 per pack ex VAT · £68.40 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 powder |
| Heavy metals | ≤ 20 ppm |
| Assay | ≥ 99% |
| Iron (Fe) | ≤5 ppm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 |
| Packing Group | II |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 72291401 |
| CAS Number | 1314-56-3 |
| Molecular Formula | P2O5 |
| Molecular Weight | 141.94 |
| Exact Mass | 141.9221 |
| SMILES | O=P(=O)OP(=O)=O |
| InChIKey | YWEUIGNSBFLMFL-UHFFFAOYSA-N |
| InChI | InChI=1S/O5P2/c1-6(2)5-7(3)4 |
| PubChem CID | 6326975 |
| UN Number | UN1807 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| Tariff Code | 2809100000 |
Safety & GHS
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Corrosive
GHS05
Hazard statements
- EUH014 Reacts violently with water
- H314 (sub cat. 1A) Causes severe skin burns and eye damage
Precautionary statements
- P223 Keep away from any possible contact with water, because of violent reaction and possible flash fire
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- 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
- 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
- diphosphonate
- diphosphonate(2-)
- Diphosphorpentaoxid
- mu-oxido-bis(hydridodioxidophosphate)(2-)
- Phosphorus (V) pentoxide
- Phosphorus oxide (P2O5)
- Phosphorus(V) oxide
- XQRLCLUYWUNEEH-UHFFFAOYSA-L
- YWEUIGNSBFLMFL-UHFFFAOYSA-N
Frequently asked questions
What is phosphorus pentoxide (P₂O₅) commonly used for?
Phosphorus pentoxide is primarily used as a strong desiccant, dehydrating agent in organic synthesis, and catalyst in chemical reactions, including esterification and polymerization.
What is the molecular formula and molecular weight of phosphorus pentoxide?
The molecular formula is **P₂O₅**, and the molecular weight is **141.94 g/mol**.
How should phosphorus pentoxide be stored?
Store in a **dry, sealed container** at **ambient temperature**, away from moisture and incompatible substances like water or alcohols.
What grades of phosphorus pentoxide does Molekula supply?
Molekula supplies **technical/industrial grade** phosphorus pentoxide, suitable for laboratory and industrial applications requiring high purity.
Can Molekula supply phosphorus pentoxide in bulk quantities?
Yes, we offer **bulk packaging options** (e.g., 5 kg, 25 kg drums) for large-scale industrial or research needs—contact us for custom quantities.
What documentation comes with an order of phosphorus pentoxide?
Each order includes a **Certificate of Analysis (CoA)**, Safety Data Sheet (SDS), and a **Material Safety Guide** outlining proper handling and disposal.
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.