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Merck

214701

Phosphorus pentoxide

ReagentPlus®, 99%

Synonym(s):

Phosphoric anhydride, Phosphorus(V) oxide

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About This Item

Linear Formula:
P2O5
CAS Number:
1314-56-3
Molecular Weight:
141.94
MDL number:
MFCD00148880
UNSPSC Code:
12352303
PubChem Substance ID:
24852847
EC Number:
215-236-1
NACRES:
NA.21
Assay:
99%
Form:
powder

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InChI

1S/O10P4/c1-11-5-12(2)8-13(3,6-11)10-14(4,7-11)9-12

InChI key

YWEUIGNSBFLMFL-UHFFFAOYSA-N

SMILES string

O=P12OP3(=O)OP(=O)(O1)OP(=O)(O2)O3

vapor density

4.9 (vs air)

vapor pressure

1 mmHg ( 384 °C), 10 mmHg ( 238 °C)

product line

ReagentPlus®

assay

99%

form

powder

pH

1.5 (20 °C, 10 g/L)

mp

340 °C (lit.)

density

2.3 g/mL at 25 °C (lit.)

cation traces

As: ≤100 mg/kg, Fe: ≤100 mg/kg, heavy metals (as Pb): ≤0.02%

Quality Level

100

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General description

Phosphorus pentoxide is a deliquescent compound prepared by reacting phosphorus with air. It is a commonly used as dehydrating and condensing agent in organic synthesis.

Application

Phosphorus pentachloride has been used for the vaccum distillation of 1-methyl-2-pyrrolidinone (NMP), which was employed as mobile phase in a chromatographic analysis.

It may be used as one of the reaction components in the synthesis of dichlorine heptoxide (Cl2O7) and transition-metal phosphides (Ni2P, Co2P and MoP). P2O5 supported on alumina can be used for the solvent-free and microwave-assisted preparation of 1, 5-benzodiazepine analogs. P2O5/KX (X = Br, I) reagent system may be used for the transformation of alcohols into the corresponding alkyl iodides and bromides.
Dehydrating agent used for halogenation with tetrabutylammonium halides.

Process for Producing Halogenated Heteroaryl Compounds
Phosphorus pentoxide/methanesulfonic acid (PPMA) may be used as a condensing agent and solvent for the synthesis of:
  • High molecular weight poly(benzoxazole)s via direct polycondensation of aromatic dicarboxylic acids containing phenyl ether structure with 3,3′-dihydroxybenzidine dihydrochloride.
  • Aromatic poly(phenylene ether ether ketone)s via direct self-polycondensation of 4-(4′-phenoxyphenoxy)benzoic acids.
  • 1,3-1H-dibenzimidazole-benzene by the reaction of isophthalic acid with 1,2-diaminobenzene.

Legal Information

ReagentPlus is a registered trademark of Merck KGaA, Darmstadt, Germany

pictograms

Corrosion
GHS05

signalword

Danger

hcodes

H314

Hazard Classifications

Eye Dam. 1 - Skin Corr. 1A

supp_hazards

EUH014

Storage Class

8A - Combustible corrosive hazardous materials

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

Substances Subject to be Indicated Names

ishl_indicated

Substances Subject to be Notified Names

ishl_notified

214701-100G: + 214701-6X1KG: + 214701-2.5KG: + 214701-500G: + 214701-6X500G: + 214701-BULK: + 214701-25KG: + 214701-250G: + 214701-VAR: + 214701-1KG:

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Certificates of Analysis (COA)

Lot/Batch Number
MKCZ6388
MKCZ6290
MKCX3928
MKCV9292
MKCW9270

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Timothy Pas et al.
Molecular pharmaceutics, 17(3), 1001-1013 (2020-01-22)
In this work, a chemical (and physical) evaluation of cryogenic milling to manufacture amorphous solid dispersions (ASDs) is provided to support novel mechanistic insights in the cryomilling process. Cryogenic milling devices are considered as reactors in which both physical transitions
Kinetics of melting and crystallization of phosphorus pentoxide.
Cormia RL, et al.
Journal of Applied Physics, 34(8), 2239-2244 (1963)
Synthesis of aromatic poly (ether ketone) s in phosphorus pentoxide/methanesulfonic acid.
Ueda M and Oda M.
Polymer Journal, 21(9), 673-679 (1989)
Synthesis of poly (benzoxazole) s by direct polycondensation of dicarboxylic acids with 3, 3??dihydroxybenzidine dihydrochloride using phosphorus pentoxide/methanesulfonic acid as condensing agent and solvent.
Ueda M, et al.
Journal of Polymer Science Part A: Polymer Chemistry, 24(5), 1019-1026 (1986)
Sulfonated polysulfone with 1, 3-1H-dibenzimidazole-benzene additive as a membrane for direct methanol fuel cells.
Fu Y, et al.
Journal of Membrane Science, 310(1), 262-267 (2008)
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