902160
Phosphorus pentoxide
anhydrous, free-flowing, Redi-Dri™, ReagentPlus®, 99%
Synonym(s):
Phosphoric anhydride, Phosphorus(V) oxide
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About This Item
Linear Formula:
P2O5
CAS Number:
Molecular Weight:
141.94
MDL number:
UNSPSC Code:
12352303
PubChem Substance ID:
NACRES:
NA.21
Assay:
99%
Grade:
anhydrous
Form:
powder
grade
anhydrous
vapor density
4.9 (vs air)
vapor pressure
1 mmHg ( 384 °C), 10 mmHg ( 238 °C)
product line
ReagentPlus®, Redi-Dri™
assay
99%
form
powder
quality
free-flowing
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
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.
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.
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.
Dehydrating agent used for halogenation with tetrabutylammonium halides.
Process for Producing Halogenated Heteroaryl Compounds
Process for Producing Halogenated Heteroaryl Compounds
Legal Information
ReagentPlus is a registered trademark of Merck KGaA, Darmstadt, Germany
Redi-Dri is a trademark of Sigma-Aldrich Co. LLC
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signalword
Danger
hcodes
Hazard Classifications
Eye Dam. 1 - Skin Corr. 1A
supp_hazards
Storage Class
8B - Non-combustible corrosive hazardous materials
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
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