Phosphorus(V) oxide, 98%, Thermo Scientific Chemicals

CAS: 1314-56-3 | O5P2 | 141.94 g/mol

Catalog Number	Quantity
ALFA13348.36	500 g

Catalog number ALFA13348.36

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500 g

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Chemical Identifiers

CAS112275-50-0

IUPAC Nametert-butyl 1,4-diazepane-1-carboxylate

Molecular FormulaC10H20N2O2

InChI KeyWDPWEXWMQDRXAL-UHFFFAOYSA-N

SMILESCC(C)(C)OC(=O)N1CCCNCC1

Specifications

Appearance (Color)Clear colorless to yellow

Assay (unspecified)≥97.5%

Refractive Index1.4680-1.4720 @ 20°C (non-U.S. specification)

FormLiquid

CommentSpecification differs for U.S. and non-U.S. material where indicated

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.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Applications
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.

Solubility
Soluble in sulfuric acid. Insoluble in acetone and ammonia. Decomposes in water.

Notes
It is highly hygroscopic in nature and gets hydrolyzed to phosphoric acid. It is stored in a separate safety cabinet away from incompatibles such as alkalis and water.

RUO – Research Use Only

General References:

Silylates primary and sec-alcohols and phenols, in the presence of p-TsOH as catalyst. If the substrate contains acid-sensitive groups, PPTS can be used: Tetrahedron Lett., 4261 (1978). See Appendix 4.
In the presence of FeCl₃, reacts with benzotrichlorides to give substituted benzoyl chlorides in good yields: J. Chem. Soc., Chem. Commun., 808 (1977).
Reacts with P₂O₅ to give trimethylsilyl polyphosphate (PPSE), a milder and more convenient dehydrating agent then polyphosphoric acid. For examples, and related reagents, see Phosphorus(V) oxide, A13348.
Meier, M. S. Phosphorus(V) Oxide. In Encyclopedia of Reagents for Organic Synthesis; Pacquette, L., Ed.; J. Wiley & Sons, New York, 2004.
Ebadi, M.; Mirdamadian, Z.; Ghanbari, D.; Moradi, L. The Effect of Aminated Carbon Nanotube and Phosphorus Pentoxide on the Thermal Stability and Flame Retardant Properties of the Acrylonitrile-Butadiene-Styrene. J. Cluster Sci. 2014, 25 (2), 541-548.