Phosphorus pentoxide
Phosphorus pentoxide (CAS: 1314-56-3; P2O5; MW: 141.94) is a powerful dehydrating agent known for its extreme hygroscopicity and vigorous reaction with water. This compound is primarily utilised in organic synthesis for dehydration reactions and as a starting material for the production of phosphoric acid and various phosphate esters. Its high purity, typically ≥99.99% trace metals basis, makes it suitable for demanding chemical processes.
- IUPAC
- Phosphoric anhydride,Phosphorus(V) oxide
- Synonyms
- Phosphoric anhydridePhosphorus(V) oxide
Dehydrating Agent
Phosphorus pentoxide is an exceptionally strong dehydrating agent, effectively removing water from various organic and inorganic compounds. It is widely employed in chemical synthesis to drive reactions that require anhydrous conditions.
Chemical Synthesis
It serves as a key reagent in numerous organic transformations, including esterification, cyclisation, and the formation of acid anhydrides. Its potent dehydrating capability facilitates these synthetic pathways.
Phosphoric Acid Production
Phosphorus pentoxide reacts exothermically with water to form phosphoric acid. This process is a significant industrial method for manufacturing phosphoric acid, a crucial component in fertilisers and detergents.
Phosphorus Chemistry
It is a fundamental precursor for synthesising a range of organophosphorus compounds and other speciality phosphorus derivatives used in various industrial applications.
| Molecular weight | 141.94 |
|---|---|
| Linear formula | P2O5 |
| Assay | ≥99.99% trace metals basis |
| Density | 2.3 g/mL at 25 °C(lit.) |
| Vapour pressure | 1 mmHg (384 °C)10 mmHg (238 °C) |
| Vapour density | 4.9 (vs air) |
| Impurities tested | ≤0.02% insolubles<100 ppm total metallic impurities |
| Melting point | 340 °C(lit.) |
Hazard statements
- H314Causes severe skin burns and eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 1807 8 / PGII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | C |
| Risk statements (R) | 35 |
| Safety statements (S) | 22-26-45 |
| Supplemental hazards | Reacts violently with water. |
| Cation traces | NH4+: ≤0.01%heavy metals: ≤0.01% |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Phosphorus pentoxide primarily used for?
+
Phosphorus pentoxide is primarily used as a powerful dehydrating agent in chemical synthesis and for the production of phosphoric acid.
What is the CAS number and chemical formula for Phosphorus pentoxide?
+
The CAS number for Phosphorus pentoxide is 1314-56-3, and its chemical formula is P2O5.
What grade and purity does Tech Serve Solutions supply for Phosphorus pentoxide?
+
Tech Serve Solutions supplies Phosphorus pentoxide with an assay of ≥99.99% on a trace metals basis. We do not represent this product as USP, BP, or EP grade.
How should Phosphorus pentoxide be handled safely?
+
Phosphorus pentoxide is a Danger hazard (GHS05) that reacts violently with water, causing severe burns (H314). Handle with appropriate personal protective equipment, including eyeshields, face shields, gloves, and a full-face particle respirator (type N100 US or P3 EN143). Ensure adequate ventilation and avoid contact with moisture.
Can Phosphorus pentoxide be packed and shipped internationally?
+
Yes, Phosphorus pentoxide is classified as UN 1807, Hazard Class 8, Packing Group II, and can be packed, shipped, and exported by Tech Serve Solutions in compliance with international regulations.
How do I request a quote or sample for Phosphorus pentoxide?
+
To request a quote or sample of Phosphorus pentoxide, please contact our sales team through the website or by phone, providing your specific requirements.
▶ Related products
1-(2-Fluorobenzyl)piperazine
C11H15FN2
Chemical Synthesis
1-(2-Fluorophenyl)biguanide hydrochloride
Chemical Synthesis
1-(2-Fluorophenyl)cyclopropanecarboxylic acid
C10H9FO2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine
C10H13FN2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine monohydrochloride
C10H13FN2 · HCl
Chemical Synthesis
1-(2-Furoyl)-1H-benzotriazole
C11H7N3O2
Chemical Synthesis
1-(2-Furoyl)piperazine
C9H12N2O2
Chemical Synthesis
1-(2-Hydroxy-5-methylphenyl)-3-phenyl-1,3-propanedione
Chemical Synthesis
▶ Explore more
3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis
3-Methyl-1,5-pentanediol
Chemical Synthesis
3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis