438081

Acido fosforico

ACS reagent, ≥85 wt. % in H₂O

• Sinonimo/i: Acido ortofosforico
• Formula condensata: H₃PO₄
• Numero CAS: 7664-38-2
• Peso molecolare: 98.00
• Beilstein: 1921286
• Numero CE: 231-633-2
• Numero MDL: MFCD00011340
• Codice UNSPSC: 12352106
• ID PubChem: 329756407

Proprietà

• Grado: ACS reagent
• Livello qualitativo: 200
• Densità del vapore: 3.4 (vs air)
• Tensione di vapore: 2.2 mmHg ( 20 °C); 5 mmHg ( 25 °C)
• Saggio: ≥85% (with NaOH, titration)
• Forma fisica: liquid
• Caratteristiche più verdi: Design for Energy Efficiency; Learn more about the Principles of Green Chemistry.
• Concentrazione: ≥85 wt. % in H₂O
• tecniche: NMR: suitable
• Impurezze: Reducing substances, passes test; ≤0.001% volatile acids (as CH₃COOH)
• Colore: APHA: ≤10
• P. eboll.: 158 °C (lit.)
• Punto di fusione: ~40 °C (lit.)
• Densità: 1.685 g/mL at 25 °C (lit.)
• Anioni in tracce: chloride (Cl^-): ≤3 ppm; nitrate (NO₃^-): ≤5 ppm; sulfate (SO₄^2-): ≤0.003%
• Cationi in tracce: As: ≤1 ppm; Ca: ≤0.002%; Fe: ≤0.003%; K: ≤0.005%; Mg: ≤0.02%; Mn: ≤0.5 ppm; Na: ≤0.025%; Sb: ≤0.002%; heavy metals: ≤0.001% (by ICP)
• Categoria alternativa più verde: Enabling,
• Stringa SMILE: OP(O)(O)=O
• InChI: 1S/H3O4P/c1-5(2,3)4/h(H3,1,2,3,4); NBIIXXVUZAFLBC-UHFFFAOYSA-N
• Informazioni sul gene: human ... SRC(6714)

Descrizione

Descrizione generale

Phosphoric acid (H₃PO₄), also known as orthophosphoric acid, is an inorganic acid. It has a wide range of industrial applications such as an intermediate to produce animal feedstock, to prepare stock solutions for workup procedures and to treat the metal surfaces for better adhesion of paint and resin coatings. In the food industry it is used as a preservative, an acidulant and flavor enhancer.

We are committed to bringing you Greener Alternative Products, which adhere to one or more of The 12 Principles of Greener Chemistry. This product has been enhanced for energy efficiency. Find details here.

Applicazioni

Phosphoric acid may be employed as standard for the determination of phosphorus-31 nuclear magnetic resonance (³¹P NMR) chemical shifts of the common phospholipids. It may be employed in the following studies:

• As external standard for the analysis of lipid composition of human white matter by ³¹P NMR spectroscopy.
• As external standard during the acid-labile phosphorylation of histone H4 by ³¹P NMR spectroscopy.
• As reference standard to investigate the surface species present on silica/alumina-supported sodium phosphates by pre- and postreaction MAS³¹P-NMR and FTIR spectroscopies.
• As catalyst in the vapor-phase Fries rearrangement of phenylacetate at 623K over a series of surface modified and unmodified ZSM-5.
• As an eco-friendly reagent for the removal of protecting groups like tert-butyl carbamates, tert-butyl esters and tert-butyl ethers.

Altre note

L′acido fosforico concentrato è circa all′85% H₃PO₄ (acquoso).

Informazioni sulla sicurezza

• Pittogrammi: GHS05,GHS07
• Avvertenze: Danger
• Indicazioni di pericolo: H290 - H302 - H314
• Consigli di prudenza: P234 - P270 - P280 - P301 + P312 - P303 + P361 + P353 - P305 + P351 + P338
• Classi di pericolo: Acute Tox. 4 Oral - Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1B
• Codice della classe di stoccaggio: 8A - Combustible, corrosive hazardous materials
• Classe di pericolosità dell'acqua (WGK): WGK 1
• Punto d’infiammabilità (°F): Not applicable
• Punto d’infiammabilità (°C): Not applicable