GHS Classification: Corrosive (GHS05)
Hazard Statements: Causes severe skin burns and eye damage; reacts violently with water.
UN Number: UN 1807
Hazard Class: 8 (Corrosive Substances)
Packing Group: II
GTC-525

Phosphorylating Agents
Phosphorus Pentoxide
- CAS No.
- 1314-56-3
- Catalogue ID
- GTC-525
Phosphorus Pentoxide, CAS 1314-56-3. Source-derived identification, physical data and applications are provided for catalogue reference; request the current specification, COA and SDS for the required grade.
Phosphoric anhydride; Diphosphorus pentoxide; Phosphoric(V) oxide; Phosphorus(V) oxide; Phosphoric oxide; Phosphorus oxide; Tetraphosphorus decaoxide
Supplied catalogue source: GTC-525 · Page 50
Reference data — confirm before ordering or use
The information below is a structured migration from the supplied catalogue snapshot. It is not a current product specification, COA or SDS. Confirm the actual supplier, grade, batch documents, classification, packing and destination requirements for your enquiry.
Basic Information of Phosphorus Pentoxide
| CAS No.: | 1314-56-3 |
|---|---|
| EC No.: | 215-236-1 |
| Linear Formula: | P₂O₅ |
| Molecular Weight: | 141.94 |
| Appearance: | White, amorphous, highly hygroscopic solid. |
| Melting Point: | 340 °C (lit.) |
| Boiling Point: | 122 °C (1 mmHg) |
| Density: | 2.3 g/mL at 25 °C (lit.) |
| Reactivity: | Reacts violently and exothermically with water to form phosphoric acid. Strong dehydrating and acidic oxide. |
| Corrosivity: | Highly corrosive to skin, eyes, and mucous membranes. |
| RIDADR: | UN 1807 8/PG 2 |
| Chemical Structure: | ![]() |
Basic Information of Phosphorus Pentoxide
| CAS No.: | 1314-56-3 |
|---|---|
| EC No.: | 215-236-1 |
| Linear Formula: | P₂O₅ |
| Molecular Weight: | 141.94 |
| Appearance: | White, amorphous, highly hygroscopic solid. |
| Odor: | 340 °C (lit.) |
| Melting Point: | 122 °C (1 mmHg) |
| Boiling Point: | 2.3 g/mL at 25 °C (lit.) |
| Density: | Reacts violently and exothermically with water to form phosphoric acid. Strong dehydrating and acidic oxide. |
| Reactivity: | Reacts violently and exothermically with water to form phosphoric acid. Strong dehydrating and acidic oxide. |
| Corrosivity: | Highly corrosive to skin, eyes, and mucous membranes. |
| RIDADR: | UN 1807 8/PG 2 |
| Chemical Structure: | ![]() |
Our commitment to delivering high-purity Phosphorus Pentoxide ensures a reliable and efficient component for your critical processes, offering consistent quality for diverse industrial needs, while prioritizing uncompromising safety in handling and logistics.
Primary Applications of Phosphorus Pentoxide
Phosphorus Pentoxide's unparalleled affinity for water and its role as a precursor to various phosphorus compounds make it an indispensable chemical with extensive applications across various industries:
Manufacturing of High-Purity Phosphoric Acid:
One of its most significant uses is in the production of high-purity phosphoric acid. Controlled hydration of P₂O₅ yields phosphoric acid, which is crucial for food-grade applications, pharmaceuticals, and specialized industrial processes.
Dehydrating Agent and Desiccant:
It is widely employed as an extremely effective dehydrating agent and desiccant in chemical laboratories and industrial processes. It's used for drying gases, liquids, and solids, and for promoting dehydration reactions in organic synthesis.
Production of Phosphate Esters and Salts:
Phosphorus Pentoxide serves as a key raw material for synthesizing various phosphate esters (used as plasticizers, flame retardants, and lubricants) and phosphate salts (used in fertilizers, food additives, and detergents).
Specialty Chemical Synthesis:
It is a crucial reagent in the synthesis of numerous specialty chemicals, including certain types of catalysts, phosphorus-containing polymers, and fine chemicals.
Pharmaceutical Intermediates:
In the pharmaceutical industry, it is used as a dehydrating agent or a phosphorylating agent in the synthesis of specific active pharmaceutical ingredients (APIs) and their intermediates.
Fiberglass and Glass Production:
It can be used as a component in the production of certain types of specialty glass and fiberglass, influencing their properties.
Exceptional Purity & Consistent Quality: Our Phosphorus Pentoxide is manufactured to stringent purity specifications, crucial for optimizing performance in sensitive applications like high-purity acid production and specialized organic synthesis.
Expert Technical & Safety Support: Our dedicated team of experienced chemists and highly trained safety specialists is readily available to offer comprehensive guidance on product application, stringent safe handling procedures, emergency response planning, and optimal storage conditions for Phosphorus Pentoxide.
Commitment to Quality & Responsible Stewardship: We adhere to the highest industry standards for quality management, environmental responsibility, and product stewardship across all our operations, ensuring peace of mind for our clients and the responsible management of hazardous chemicals.
Hazards Classification

Confirm the current commercial product record.
Include the required grade or purity, quantity, preferred packing, destination country/port and required document set.
- 01Current specification
- 02Batch or sample COA
- 03Product- and supplier-specific SDS
- 04Packing and shipping review
