MilliporeSigma
All Photos(1)

Documents

184225

Sigma-Aldrich

Hydrogen fluoride pyridine

pyridine ~30 %, hydrogen fluoride ~70 %

Sign Into View Organizational & Contract Pricing

Synonym(s):
HF-Pyridine, Olah′s reagent, PPHF, Poly(pyridine fluoride), Pyridine hydrofluoride, Pyridinium poly(hydrogen fluoride), Pyridinium polybifluoride
CAS Number:
Beilstein/REAXYS Number:
4750151
MDL number:
PubChem Substance ID:
NACRES:
NA.22

form

liquid

Quality Level

composition

hydrogen fluoride, ~70%
pyridine, ~30%

density

1.1 g/mL at 20 °C (lit.)

storage temp.

−20°C

SMILES string

F[H].c1ccncc1

InChI

1S/C5H5N.FH/c1-2-4-6-5-3-1;/h1-5H;1H

InChI key

GRJJQCWNZGRKAU-UHFFFAOYSA-N

Looking for similar products? Visit Product Comparison Guide

Compare Similar Items

View Full Comparison

Show Differences

1 of 4

This Item
437646PHR1408338869
Hydrogen fluoride pyridine pyridine ~30 %, hydrogen fluoride ~70 %

184225

Hydrogen fluoride pyridine

Sodium hydrogen difluoride granular, 98%

437646

Sodium hydrogen difluoride

Sodium Fluoride Pharmaceutical Secondary Standard; Certified Reference Material

PHR1408

Sodium Fluoride

Ammonium fluoride ≥99.99% trace metals basis

338869

Ammonium fluoride

composition

hydrogen fluoride, ~70%

composition

-

composition

-

composition

-

density

1.1 g/mL at 20 °C (lit.)

density

-

density

-

density

-

storage temp.

−20°C

storage temp.

-

storage temp.

2-30°C

storage temp.

-

General description

May contain or form low levels of calcium fluoride during storage. Presence of this does not impact the specification values.

Application

Convenient form of anhydrous HF, stable up to 50°C. Has been used for the preparation of β-fluoroamines from amino alcohols and for the fluorination of acetylenes.
Used together with hypervalent iodine(III) reagents for ipso-fluorination of para-substituted phenols providing cyclohexadienones. Employed with Selectfluor (Catalog No. 439479) for geminal fluorination of 2,2-diaryl-1,3-dithiolanes.
Reactant for preparation of:
  • Epimers of shikimic acid with the features of fucosylated glycans via zinc-mediated reductive ring opening followed by a Barbier reaction
  • Vaccinia H1-related (VHR) phosphatase inhibitor with a nonacidic phosphate-mimicking core structure
  • Candidates for nucleic acid drugs
  • ω-substituted gem-difluoroalkanes by oxidative desulfurization-difluorination

Reagent for:
  • Halofluorination reactions

Legal Information

Selectfluor is a registered trademark of Merck KGaA, Darmstadt, Germany
Sure/Pac is a trademark of Sigma-Aldrich Co. LLC

pictograms

CorrosionSkull and crossbones

signalword

Danger

Hazard Classifications

Acute Tox. 1 Dermal - Acute Tox. 2 Inhalation - Acute Tox. 2 Oral - Eye Dam. 1 - Skin Corr. 1A

Storage Class

6.1A - Combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials

wgk_germany

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Documents related to the products that you have purchased in the past have been gathered in the Document Library for your convenience.

Visit the Document Library

Difficulty Finding Your Product Or Lot/Batch Number?

Product numbers are combined with Pack Sizes/Quantity when displayed on the website (example: T1503-25G). Please make sure you enter ONLY the product number in the Product Number field (example: T1503).

Example:

T1503
Product Number
-
25G
Pack Size/Quantity

Additional examples:

705578-5MG-PW

PL860-CGA/SHF-1EA

MMYOMAG-74K-13

1000309185

enter as 1.000309185)

Having trouble? Feel free to contact Technical Service for assistance.

Lot and Batch Numbers can be found on a product's label following the words 'Lot' or 'Batch'.

Aldrich Products

  • For a lot number such as TO09019TO, enter it as 09019TO (without the first two letters 'TO').

  • For a lot number with a filling-code such as 05427ES-021, enter it as 05427ES (without the filling-code '-021').

  • For a lot number with a filling-code such as STBB0728K9, enter it as STBB0728 without the filling-code 'K9'.

Not Finding What You Are Looking For?

In some cases, a COA may not be available online. If your search was unable to find the COA you can request one.

Request COA

Customers Also Viewed

Slide 1 of 2

1 of 2

Journal of Fluorine Chemistry, 37, 343-343 (1987)
Tetrahedron, 60, 6629-6629 (2004)
Tetrahedron Letters, 32, 69-69 (1991)
V Prakash Reddy et al.
Chemical communications (Cambridge, England), (5), 654-656 (2005-01-27)
2,2-diaryl-1,3-dithiolanes, readily obtainable from diaryl ketones, were transformed into the corresponding gem-difluoro compounds using a novel reagent combination involving Selectfluor and pyridinium polyhydrogen fluoride (PPHF) under mild conditions in moderate to good yields.
Hui Shen et al.
Infection and immunity, 83(7), 2694-2704 (2015-04-22)
Fungi can shield surface pathogen-associated molecular patterns (PAMPs) for evading host immune attack. The most common and opportunistic human pathogen, Candida albicans, can shield β-(1 3)-glucan on the cell wall, one of the major PAMPs, to avoid host phagocyte Dectin-1

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service