Phosphorus pentoxide

Synonym(s):di-Phosphorus pentoxide;Phosphoric anhydride;Phosphorus pentoxide, 7.7 wt. % in methanesulfonic acid;Phosphorus(V) oxide;Sicapent

CAS NO.：1314-56-3
Empirical Formula: O5P2
Molecular Weight: 141.94
MDL number: MFCD00011440
EINECS: 215-236-1
SAFETY DATA SHEET (SDS)
Update Date: 2023-11-27 13:03:33

What is Phosphorus pentoxide?

Description

Phosphorus pentoxide (empirical formula P2O5) is known to many laboratory workers as a powerful desiccant. It is manufactured by burning elemental phosphorus in a current of dry air. P2O5?exists in several crystalline and amorphous forms, the most common of which is the crystalline P4O10?shown. In the fertilizer industry, phosphorus concentration is expressed as weight percent P2O5?equivalent.

The Uses of Phosphorus pentoxide

Phosphorus(V) oxide is used as a drying and dehydrating agent, a condensation reagent in organic synthesis and a laboratory reagent. It is also used in sugar refining and in fire extinguishing. Phosphorus pentoxide in DMSO forms an Onodera reagent which oxidizes alcohols. It is capable of converting mineral acids to anhydrides.

What are the applications of Application

Phosphorus pentoxide is a dehydrating agent employed as a dessicant

Properties of Phosphorus pentoxide

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
storage temp.	no restrictions.
solubility	Soluble in sulfuric acid. Insoluble in acetone and ammonia.
form	Very Deliquescing Powder
appearance	White powder
color	White
Odor	Pungent odour
Water Solubility	Soluble in sulfuric acid. Insoluble in acetone and ammonia. Decomposes in water.
Sensitive	Moisture Sensitive

Safety information for Phosphorus pentoxide

Signal word	Danger
Pictogram(s)	Corrosion Corrosives GHS05
GHS Hazard Statements	H314:Skin corrosion/irritation
Precautionary Statement Codes	P260:Do not breathe dust/fume/gas/mist/vapours/spray. P280:Wear protective gloves/protective clothing/eye protection/face protection. P363:Wash contaminated clothing before reuse. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.