Phosphorus Pentoxide (P₂O₅)
White deliquescent powder — the strongest industrial dehydrating agent & raw material for Polyphosphoric Acid.
Product Overview
The Premier Industrial Dehydrating & Phosphorylating Agent
Phosphorus Pentoxide (P₂O₅), also known as Phosphoric Anhydride, is a white deliquescent crystalline powder with an extreme affinity for water. It is recognized as the strongest industrial desiccant available, capable of drying gases and organic solvents to residual moisture levels below 1 ppm.
Technical Specifications
Physical & Chemical Properties
Analytical parameters verified by in-house quality control.
| Chemical Formula | P₂O₅ |
|---|---|
| CAS Number | 1314-56-3 |
| UN / Hazard Class | UN 1807 · Class 8 (PG II) |
| Appearance | White deliquescent powder/granules |
| Assay (as P₂O₅) | ≥ 98.5% |
| Molar Mass | 141.94 g/mol |
| Melting Point | ~340 °C |
| Sublimation | ~360 °C |
| Reactivity | Violent exothermic reaction with water → H₃PO₄ |
Packaging & Supply
Flexible Supply Configurations
Airtight, moisture-proof drums ensure product freshness and long shelf life.
Hazard Warning: P₂O₅ is UN 1807, Class 8 Corrosive. Reacts violently with water releasing intense heat and corrosive phosphoric acid fumes. Keep dry and use full acid-resistant PPE.
Industrial Applications
Where P₂O₅ Powers Global Chemistry
Key applications spanning pharmaceutical synthesis, desiccant drying, and specialty chemicals.
Pharma Synthesis
Dehydrating agent in ring-closure condensations for synthesizing benzimidazoles, oxazoles, and quinoline intermediates, as well as Friedel-Crafts acylations.
PPA Manufacturing
Essential raw material precursor reacted with orthophosphoric acid to manufacture Polyphosphoric Acid (PPA). Darshan Fine Chem Private Limited produces both P₂O₅ and PPA.
Gas & Solvent Drying
The strongest industrial desiccant. Used for deep drying of gases (HCl, SO₂, CO₂) and moisture-sensitive organic solvents in chemical plants and laboratories.
Specialty Esters
Reacts with alcohols to produce mono- and dialkyl phosphoric acid esters used as surfactants, extractants, and lubricant additives.
Phosphate Glass & Materials
Component in specialty optical glass formulations, ceramic glazes, and phosphorus-based catalysts.
Why Source from Us
Darshan Fine Chem Private Limited Quality Promise
Airtight Packaging
Sealed drum packaging ensures the powder remains dry and free-flowing without caking.
≥98.5% Assay
High P₂O₅ content guarantees maximum dehydrating power and reaction yield.
COA & SDS Included
Batch COA and GHS Safety Data Sheet accompany every delivery.
Reliable Supply
Consistent production schedules from Sayakha GIDC, Bharuch, Gujarat for prompt domestic & export dispatch.
FAQs
Frequently Asked Questions — Phosphorus Pentoxide
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