Phosphorus pentoxide

Synonyms:Phosphoric anhydride

Molecular Formula:P₂O₅

Molecular Weight:141.94

IMDG classification and number:GB8.1, 81063. Former rail regulation: First-level Inorganic acid corrosive goods, 91034, UN NO.: 1807. IMDG CODE page 8198, type 8.

Uses:It is the material of Phosphorus oxychloride and metaphosphoric acid, acrylate, surfactant, dehydrating agent, desiccant, antistatic agent, refining of medicines and sugar, analytical reagent.

Physical and chemical properties:In normal condition, it is one kind of white crystalline powder, and is easy to deliquescence. Density 0.9g/cm³, Sublimation at 300 ℃. Melting point 580-585℃. Vapor pressure 133.3Pa (384℃) .

Storage and transportation:corrosive goods. Packing method: (Ⅱ) Class. Stored in a cool, dry and ventilated warehouse. Far away from inflammable and alkaline substances. Load & unload gently, avoid breakage. Sealed tightly, avoid rain and moisture.

Shelf period:May to September can be stored for 30 days;October to April can be stored for 60 days; or six months in sealed drum.

Specifications and quality Index:

Item	Index
Item	Chemically pure	AR	Special Grade
Assay (P₂O₅)	≥99%	≥99%	≥99%
Active R value	1.2	1.7	2
Reducing matter (as P₂O₅)	≤0.01	≤0.008	≤0.005
Clarity test	Qualified	Qualified	Qualified
Water Insoluble Matter %	≤0.02	≤0.01	≤0.01
Total nitrogen (N) %	≤0.01	≤0.002	≤0.001
Heavy Metals (Pb) %	≤0.01	≤0.002	≤0.001
Fe %	≤0.01	≤0.002	≤0.001
As %	≤0.01	≤0.007	≤0.005

Packing:

5-25kg woven bag

25-55kg cardboard drum

50kg metal pail

50kg plastic drum

200kg metal pail

Flexible Freight Bag

25kg metal pail

Properties

Phosphorus pentoxide is a kind of phosphorus oxide formed by white phosphorus, yellow phosphorus or red phosphorus burning in dry air. It is white soft powder or colorless monoclinic crystal at room temperature, and is easy to deliquescence. Phosphorus pentoxide is a common raw material and reagent in the chemical industry. It is widely used in medicine, coating additives, printing and dyeing additives, antistatic agents, chemical industry and other industries. It is mainly used in the manufacture of high-purity phosphoric acid, gas and liquid desiccants, organic synthetic dehydrating agents, and the preparation of organic phosphoric acid.

CAS No.

1314-56-3

Formula

O5P2

Molecular Mass

141.94500

Exact Mass

141.92200

PSA

145.79000

Logp

1.17880