298220

Phosphorus pentoxide

powder, ACS reagent, ≥98.0%

• Synonyme(s) : Phosphoric anhydride, Phosphorus(V) oxide
• Formule linéaire : P₂O₅
• Numéro CAS: 1314-56-3
• Poids moléculaire : 141.94
• Numéro CE : 215-236-1
• Code UNSPSC : 12352303
• ID de substance PubChem : 24857969
• Nomenclature NACRES : NA.21

Propriétés

• Qualité: ACS reagent
• Niveau de qualité: 200
• Densité de vapeur: 4.9 (vs air)
• Pression de vapeur: 1 mmHg ( 384 °C); 10 mmHg ( 238 °C)
• Pureté: ≥98.0%
• Forme: powder
• Impuretés: P₂O₃, passes test (lim. ~0.02%); ≤0.02% insolubles
• pH: 1.5 (20 °C, 10 g/L)
• Pf: 340 °C (lit.)
• Densité: 2.3 g/mL at 25 °C (lit.)
• Traces de cations: NH₄⁺: ≤0.01%; heavy metals (as Pb): ≤0.01%
• Chaîne SMILES: 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
• Clé InChI: YWEUIGNSBFLMFL-UHFFFAOYSA-N

Description

Description générale

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

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.

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.

Informations sur la sécurité

• Pictogrammes: GHS05
• Mention d'avertissement: Danger
• Mentions de danger: H314
• Conseils de prudence: P260 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 - P363
• Classification des risques: Eye Dam. 1 - Skin Corr. 1A
• Risques supp: EUH014
• Code de la classe de stockage: 8A - Combustible corrosive hazardous materials
• Classe de danger pour l'eau (WGK): WGK 1
• Point d'éclair (°F): Not applicable
• Point d'éclair (°C): Not applicable
• Équipement de protection individuelle: Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges