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345245 Sigma-Aldrich

Phosphoric acid

Green Alternative

85 wt. % in H2O, 99.99% trace metals basis

Synonym: Orthophosphoric acid

  • CAS Number 7664-38-2

  • Linear Formula H3PO4

  • Molecular Weight 98.00

  •  Beilstein/REAXYS Number 1921286

  •  MDL number MFCD00011340

  •  PubChem Substance ID 24861303

  •  NACRES NA.23

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Properties

Related Categories Acids, Alternative Energy, Battery Electrolyte Materials, Chemical Synthesis, Electrolytes,
Quality Level   200
vapor density   3.4 (vs air)
vapor pressure   2.2 mmHg ( 20 °C)
  5 mmHg ( 25 °C)
assay   99.99% trace metals basis
greener alternative product characteristics   Design for Energy Efficiency
Learn more about the Principles of Green Chemistry.
concentration   85 wt. % in H2O
bp   158 °C (lit.)
mp   ~40 °C (lit.)
density   1.685 g/mL at 25 °C (lit.)
Featured Industry   Battery Manufacturing
SMILES string   OP(O)(O)=O
InChI   1S/H3O4P/c1-5(2,3)4/h(H3,1,2,3,4)
InChI key   NBIIXXVUZAFLBC-UHFFFAOYSA-N
Gene Information   human ... SRC(6714)

Description

General description

In aqueous solutions, phosphoric acid behaves as a triprotic acid. The triprotic acid has three ionizable hydrogen atoms, which are lost sequentially.

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.

Application

Phosphoric acid (85 wt. % in H2O) can be used for a variety of applications, such as:
• a medium for corrosion inhibition on mild steel
• an activating agent in the preparation of activated carbon
• enhancement of electrochemical performance for energy devices
• in the development of polymeric membranes for proton exchange membrane based fuel cells

Phosphoric acid has been used as an acid solution for pH adjustment of the fermentation broth in a protocol for the acetone-butanol-ethanol (ABE) fermentation of sugars in a bioreactor.

Packaging

100, 500 mL in glass bottle

Packaged in clear glass bottles

Other Notes

Concentrated phosphoric acid is approx. 85% H3PO4 (aqueous).

Safety & Documentation

Safety Information

Symbol 
GHS05  GHS05
Signal word 
Danger
Hazard statements 
RIDADR 
UN 1805 8 / PGIII
WGK Germany 
WGK 1
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable

Documents

Certificate of Analysis (COA)

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Certificate of Origin (COO)

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Protocols & Articles

Articles

Low Resistivity Nanoscale Devices by Templated Electrochemistry

Mazin Maqableh, Madhukar Reddy (not pictured), Bethanie Stadler* Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, USA *Email: stadler@u...
Keywords: Deposition, Diffusion, Electrochemical analysis, Electronics, Materials Science, Nanoelectronics, Nanomaterials, PAGE, Semiconductor

Peer-Reviewed Papers
15

References

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