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208213 Sigma-Aldrich

Polyphosphoric acid

Green Alternative

reagent grade, 115% H3PO4 basis

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Properties

Related Categories Acids, Acids & Bases, Alternative Energy, Analytical Reagents, Analytical Reagents for General Use,
grade   reagent grade
assay   115% H3PO4 basis
greener alternative product characteristics   Design for Energy Efficiency
Learn more about the Principles of Green Chemistry.
bp   300 °C (lit.)
density   2.06 g/mL at 25 °C

Description

General description

Polyphosphoric acid (PPA) is widely employed as acylation and alkylation reagent in various reactions. It is a strong mineral acid with excellent dehydrating properties.

Application

Polyphosphoric acid may be used in the synthesis of aromatic sulfones, N-substituted amides and 4-aminobenzophenones. It may also be used in dehydration, Fischer-Indole Synthesis, Beckmann Rearrangement and Schmidt Rearrangement reactions. It can be used as a catalyst in the synthesis of various aromatic ketones.
PPA may be used as a catalyst during the synthesis of dimethyl carbonate (DMC) from urea and methanol. It also acts as an absorbent for the ammonia generated in the process. PPA may be used to prepare silica-supported polyphosphoric acid (PPA-SiO2), an easy to handle, reusable heterogenous catalyst.

Packaging

1 kg in poly bottle

100 g in poly bottle

25 g in glass bottle

Other Notes

Sigma Life Science is 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.

Safety & Documentation

Safety Information

Symbol 
GHS05  GHS05
Signal word 
Danger
Hazard statements 
Precautionary statements 
RIDADR 
UN 3264 8 / PGII
WGK Germany 
1

Documents

Certificate of Analysis

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Certificate of Origin

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Protocols & Articles

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Peer-Reviewed Papers
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References

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