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214701

Sigma-Aldrich

Phosphorus pentoxide

ReagentPlus®, 99%

Synonym(s):

Phosphoric anhydride, Phosphorus(V) oxide

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100 G
$55.00
500 G
$103.00
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$169.00
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$280.00
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100 G
$55.00
500 G
$103.00
1 KG
$169.00
2.5 KG
$280.00
6 X 1 KG
$660.00

About This Item

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

$55.00

In StockDetails

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vapor density

4.9 (vs air)

Quality Level

100

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%

SMILES string

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

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

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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.[1]

Application

Dehydrating agent used for halogenation with tetrabutylammonium halides.

Process for Producing Halogenated Heteroaryl Compounds
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.[2]

It may be used as one of the reaction components in the synthesis of dichlorine heptoxide (Cl2O7)[3] and transition-metal phosphides (Ni2P, Co2P and MoP).[4] P2O5 supported on alumina can be used for the solvent-free and microwave-assisted preparation of 1, 5-benzodiazepine analogs.[5] P2O5/KX (X = Br, I) reagent system may be used for the transformation of alcohols into the corresponding alkyl iodides and bromides.[6]
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.[7]
  • Aromatic poly(phenylene ether ether ketone)s via direct self-polycondensation of 4-(4′-phenoxyphenoxy)benzoic acids.[8]
  • 1,3-1H-dibenzimidazole-benzene by the reaction of isophthalic acid with 1,2-diaminobenzene.[9]

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_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

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

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Certificates of Analysis (COA)

Lot/Batch Number
MKCV9292
MKCW9270
MKCX0345
MKCV6601
MKCT0459

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Slide 1 of 1

1 of 1

Phosphorus, red ≥99.99% trace metals basis

Sigma-Aldrich

343242

Phosphorus, red

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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    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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