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208213

Sigma-Aldrich

Polyphosphoric acid

greener alternative

reagent grade, 115% H3PO4 basis

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About This Item

Fórmula linear:
Hn+2PnO3n+1
Número CAS:
8017-16-1
Número CE:
232-417-0
Número MDL:
MFCD00084480
Código UNSPSC:
12352106
eCl@ss:
38070203
NACRES:
NA.21

grau

reagent grade

Nível de qualidade

200

Ensaio

115% H3PO4 basis

forma

viscous liquid

características do produto alternativo mais ecológico

Design for Energy Efficiency
Learn more about the Principles of Green Chemistry.

sustainability

Greener Alternative Product

pb

300 °C (lit.)

densidade

2.06 g/mL at 25 °C

categoria alternativa mais ecológica

Enabling,

InChI

1S/O5P2.H3O4P/c1-2-7-4-3-6(1)5-7;1-5(2,3)4/h;(H3,1,2,3,4)

chave InChI

FVYIVXLIMHNYTD-UHFFFAOYSA-N

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Descrição geral

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

Aplicação

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.

Outras notas

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.

Pictogramas

Corrosion
GHS05

Palavra indicadora

Danger

Frases de perigo

H290,H314

Classificações de perigo

Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1B

Código de classe de armazenamento

8A - Combustible corrosive hazardous materials

Classe de risco de água (WGK)

WGK 1

Certificados de análise (COA)

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Silica-supported polyphosphoric acid (PPA-SiO2): An efficient and reusable heterogeneous catalyst for ecofriendly organic synthesis.
Vekariya RH, et al.
Synthetic Communications, 46(3), 197-219 (2016)
906. Synthetic uses of polyphosphoric acid.
Denton DA and Suschitzky H.
Journal of the Chemical Society, 4741-4743 (1963)
Synthesis of dimethyl carbonate from urea and methanol using polyphosphoric acid as catalyst.
Sun J, et al.
J. Mol. Catal. A: Chem., 239(1), 82-86 (2005)
Meng-Yang Chang et al.
Organic letters, 14(9), 2198-2201 (2012-04-21)
A straightforward synthesis of 3,8-dimethoxy-10,11-dihydrobenzo[j]fluoranthen-12-ones 1 is reported in a seven-step route from biphenyl-4,4'-diol 2 via the transformation of a double Claisen rearrangement, cross metathesis with ethyl acrylate, and polyphosphoric acid (PPA)-promoted Friedel-Crafts electrophilic benzannulation in good yields.
Stanimir Manolov et al.
Molecules (Basel, Switzerland), 18(2), 1869-1880 (2013-02-05)
We report herein an application of an α-amidoalkylation reaction, as an alternative efficient synthesis of 4-aryl- and 4-methyl-1,2,3,4-tetrahydroisoquinoline derivatives. The amides required for this purpose would result from reaction of aminoacetaldehyde dimethylacetal with different substituted benzenes in polyphosphoric acid, followed
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