Phosphorus pentoxide
SIAL/298220 - powder, ACS reagent, ≥98.0%
Synonym: Phosphoric anhydride; Phosphorus(V) oxide
CAS Number: 1314-56-3
Empirical Formula (Hill Notation): O5P2
Molecular Weight: 141.94
EC Number: 215-236-1
Linear Formula: P2O5
Product Type: Chemical
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: 298220-250G
This image depicts SKU: 298220-250G
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: 298220-500G
This image depicts SKU: 298220-500G
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: 298220-6X500G
This image depicts SKU: 298220-6X500G
| assay | ≥98.0% |
| cation traces | heavy metals (as Pb): ≤0.01% |
| NH4+: ≤0.01% | |
| density | 2.3 g/mL at 25 °C (lit.) |
| form | powder |
| grade | ACS reagent |
| impurities | P2O3, passes test (lim. ~0.02%) |
| ≤0.02% insolubles | |
| InChI | 1S/O10P4/c1-11-5-12(2)8-1 |
| InChI key | YWEUIGNSBFLMFL-UHFFFAOYSA |
| mp | 340 °C (lit.) |
| pH | 1.5 (20 °C, 10 g/L) |
| Quality Level | 200  |
| SMILES string | O=P12OP3(=O)OP(=O)(O1)OP( |
| vapor density | 4.9 (vs air) |
| vapor pressure | 1 mmHg ( 384 °C) |
| 10 mmHg ( 238 °C) |
| Application: | 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. |
| Application: | 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)benz • 1,3-1H-dibenzimidazole-benzene by the reaction of isophthalic acid with 1,2-diaminobenzene. |
| 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. |
| Packaging: | 250, 500, 6×500 g in poly bottle |
| Packaging: | 5 g in glass bottle |
| Symbol |  GHS05 |
| Signal word | Danger |
| Hazard statements | H314 |
| Precautionary statements | P260 - P280 - P301 + P330 + P331 - P303 + P361 + P353 - P305 + P351 + P338 + P310 |
| Hazard Codes | C |
| Risk Statements | 35 |
| Safety Statements | 22-26-45 |
| RIDADR | UN 1807 8 / PGII |
| WGK Germany | WGK 1 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Supplemental Hazard Statements | EUH014 |
| Purity | ≥98.0% |
| mp | 340 °C (lit.) |
| Density | 2.3 g/mL at 25 °C (lit.) |
| UNSPSC | 12352300 |