Phosphorus Pentoxide Powder ACS Reagent, 98% , 500 grams, case/6

Phosphorus Pentoxide Powder ACS Reagent, 98% , 500 grams, case/6

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Phosphorus Pentoxide Powder ACS Reagent 98.0% , 500 Gram, Case/6

 Synonym: Phosphoric anhydride, Phosphorus(V) oxideCAS Number 111-84-2

  • CAS Number 1314-56-3
  • Linear Formula P2O5
  • Molecular Weight 141.94
  • EC Number 215-236-1
  • PubChem Substance ID 24857969
  • NACRES NA.21
Quality Level 200
grade ACS reagent
vapor density  4.9 (vs air)
vapor pressure

1 mmHg ( 384 °C)

10 mmHg ( 238 °C)

assay ≥98.0%
form powder

P2O3, passes test (lim. ~0.02%)
≤0.02% insolubles

mp 340 °C (lit.)
density 2.3 g/mL at 25 °C (lit.)
cation traces

NH4+: ≤0.01%
heavy metals (as Pb): ≤0.01%

General description
Phosphorus pentoxide can be prepared by reacting phosphorus with air. It is commonly used as a dehydrating and condensing agent in organic synthesis.


Phosphorus pentoxide may be used for the vacuum 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.

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.P8}
• 1,3-1H-dibenzimidazole-benzene by the reaction of isophthalic acid with 1,2-diaminobenzene.

Safety Information


Signal word Danger
Hazard statements H314
Precautionary statements P280-P303 + P361 + P353-P304 + P340 + P310-P305 + P351 + P338
Supplemental Hazard Statements Reacts violently with water.
Personal Protective Equipment Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges
WGK Germany 1
RTECS TH3945000


Safety Data Sheet


Note: These chemicals are for research & laboratory use only. Your order will not be processed if you do not work for, and ship to, a registered laboratory or research facility. Not for topical applications. An official Declaration of Use form may be required.

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WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and reproductive harm. Prop 65 Warning

Please note: This product is not returnable.

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