695017

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: 329761708
• NACRES: NA.21

Proprietà

• Grado: ACS reagent
• Densità del vapore: 3.4 (vs air)
• Tensione di vapore: 2.2 mmHg ( 20 °C); 5 mmHg ( 25 °C)
• Saggio: ≥85% H₃PO₄ basis (by NaOH, titration)
• Stato: liquid
• Concentrazione: ≥85 wt. % in H₂O
• tecniche: NMR: suitable
• Impurezze: reducing substances, passes test; ≤0.001% volatile acids (as CH₃COOH)
• Colore: APHA: ≤10
• P. ebollizione: 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)
• 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) is useful in industry for treating the metal surfaces to obtain better adhesion of paint and resin coatings.

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.

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 - P280 - P301 + P312 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Classi di pericolo: Acute Tox. 4 Oral - Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1B
• 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