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).
Material category: Lab Essentials
Material Group 1: Acids/Bases
Material Group 2: ACS Grade Acids
GHS pictograms: GHS05
Signal Words: Danger
H Statements: H314;H290
P Statements: P280;P284;P234;P260;P302 + P352;P308 + P313;P305 + P351 + P338;P304 + P340;P301 + P330 + P331
Storage condition: Room Temperature
Shipment condition: Room Temperature
C.A.S. Number 1: 7664-38-2
C.A.S. Number 1 Percentage: 1
C.A.S. Number 2: 7732-18-5
C.A.S. Number 2 Percentage: 15.0000 %
C.A.S. Number 6 Percentage: 7732-18-5