298220

Phosphorus pentoxide

powder, ACS reagent, ≥98.0%

• Sinonimo/i: Phosphoric anhydride, Phosphorus(V) oxide
• Formula condensata: P₂O₅
• Numero CAS: 1314-56-3
• Peso molecolare: 141.94
• Numero CE: 215-236-1
• Codice UNSPSC: 12352303
• ID PubChem: 24857969
• NACRES: NA.21

Proprietà

• Grado: ACS reagent
• Livello qualitativo: 200
• Densità del vapore: 4.9 (vs air)
• Tensione di vapore: 1 mmHg ( 384 °C); 10 mmHg ( 238 °C)
• Saggio: ≥98.0%
• Forma fisica: powder
• Impurezze: P₂O₃, passes test (lim. ~0.02%); ≤0.02% insolubles
• pH: 1.5 (20 °C, 10 g/L)
• Punto di fusione: 340 °C (lit.)
• Densità: 2.3 g/mL at 25 °C (lit.)
• Cationi in tracce: NH₄⁺: ≤0.01%; heavy metals (as Pb): ≤0.01%
• Stringa SMILE: 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; YWEUIGNSBFLMFL-UHFFFAOYSA-N

Descrizione

Descrizione generale

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

Applicazioni

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.

Informazioni sulla sicurezza

• Pittogrammi: GHS05
• Avvertenze: Danger
• Indicazioni di pericolo: H314
• Consigli di prudenza: P260 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 - P363
• Classi di pericolo: Eye Dam. 1 - Skin Corr. 1A
• Rischi supp: EUH014
• Codice della classe di stoccaggio: 8B - Non-combustible corrosive hazardous materials
• Classe di pericolosità dell'acqua (WGK): WGK 1
• Punto d’infiammabilità (°F): Not applicable
• Punto d’infiammabilità (°C): Not applicable
• Dispositivi di protezione individuale: Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges