Phosphoric acid (H3PO4) is useful in industry for treating the metal surfaces to obtain better adhesion of paint and resin coatings.
Synonyms: Orthophosphoric acid
Molecular Formula: H3O4P
Molecular Weight: 98.0
Linear Structural Formula: H3PO4
MDL Number: MFCD00011340
Purity: >=85% H3PO4 basis (by NaOH, titration)
Melting Point: ~40 C (lit.)
Density: 1.685 g/mL at 25 C (lit.)
Application: 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.
Other Notes: Concentrated phosphoric acid is approx. 85% H3PO4 (aqueous).
<p><strong>Material category: </strong>Lab Essentials</p>
<p><strong>Material Group 1: </strong>Acids/Bases</p>
<p><strong>Material Group 2: </strong>ACS Grade Acids</p>
<p><strong>GHS pictograms: </strong>GHS05</p>
<p><strong>Signal Words: </strong>Danger</p>
<p><strong>H Statements: </strong>H314;H290</p>
<p><strong>P Statements: </strong>P280;P284;P234;P260;P302 + P352;P308 + P313;P305 + P351 + P338;P304 + P340;P301 + P330 + P331</p>
<p><strong>Storage condition: </strong>Room Temperature</p>
<p><strong>Shipment condition: </strong>Room Temperature</p>
<p><strong>C.A.S. Number 1: </strong>7664-38-2</p>
<p><strong>C.A.S. Number 1 Percentage: </strong>1</p>
<p><strong>C.A.S. Number 2: </strong>7732-18-5</p>
<p><strong>C.A.S. Number 2 Percentage: </strong>15.0000 %</p>
<p><strong>C.A.S. Number 6 Percentage: </strong>7732-18-5</p>