Phosphorus pentoxide
Also known as: EINECS 215-236-1, GRANULATED, MFCD00011440, NA 1807, PHOSPHORUS OXIDE, Phosphoric anhydride, Phosphoricoxide, Phosphorpentoxid, Phosphorus(V) oxide, Phosphorusoxide, SICAPENT, SICAPENT(R), phosphoric anhydride，H．P．, phosphorus pentoxide, phosphorus pentoxidedessicant, phosphorusoxide(p2o5), phosphorusoxide[p2o5], phosphoruspentoxide101
Phosphorus pentoxide (CAS 1314-56-3) is a compound in the Inorganic Chemicals category listed in the Jingsj chemical database. It has the molecular formula O5P2 and a molecular weight of 141.945 g/mol. Key properties include a melting point of 340 °C(lit.), a boiling point of 122 °C (1 mmHg), a density of 2.3 g/mL at 25 °C(lit.) and a flash point of 340-360°C. It is classified under GHS with signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 1314-56-3
- Jingsj CID
- J-29844-7
- Molecular Formula
- O5P2
- Molecular Weight
- 141.945 g/mol
- Category
- Inorganic Chemicals
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 340 °C(lit.) |
|---|---|
| Boiling Point | 122 °C (1 mmHg) |
| Density | 2.3 g/mL at 25 °C(lit.) |
| Flash Point | 340-360°C |
| Exact Mass | 141.922089 |
| PSA | 145.79000 |
| LogP | 1.17880 |
| Additional Property | 4.9 (vs air) |
| Vapor Pressure | 1 mm Hg ( 384 °C) |
| Refractive Index | 1.433-1.436 |
GHS Safety & Compliance
- H314 — Causes severe skin burns and eye damage
Customs & Trade Information
| HS Code | 2809100000 |
|---|
Frequently Asked Questions
What is the CAS number of Phosphorus pentoxide?
The CAS number of Phosphorus pentoxide is 1314-56-3.
What are the molecular formula and molecular weight of Phosphorus pentoxide?
Phosphorus pentoxide has molecular formula O5P2 and molecular weight 141.945 g/mol.
Is Phosphorus pentoxide hazardous?
Phosphorus pentoxide has GHS signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Phosphorus pentoxide (CAS 1314-56-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-29844-7 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.