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Pyridinium p-Toluenesulfonate
(CAS RN:24057-28-1 Product Number:P0942)


Pyridinium p-Toluenesulfonate
Synonym PPTS

General Information

Product Number P0942

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Purity/Analysis Method >98.0%(T)
Storage Temperature
M.F. / M.W. C5H5N·C7H8O3S=251.30
CAS RN 24057-28-1
Related CAS RN
MDL Number MFCD00013108
Packaging and Container
  • Product Details
  • Safety & Regulations


Purity(Neutralization titration) min. 98.0 %
Melting point 118.0 to 122.0 deg-C
Solubility in Water almost transparency


Beilstein 20(2)129
Reaxys-RN 3764305
PubChem SID 87575059
F&F 9,400
EC Number 246-002-7


Signal Word Warning
Hazard Statements
  • H319
  • :Causes serious eye irritation.
Precautionary Statements
  • P264
  • :Wash hands and face thoroughly after handling.
  • P280
  • :Wear eye protection.
  • P305+P351+P338+P337+P313
  • :IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical advice or attention.

Transport Information

HS Number 2933310000


Application for Introduction of Protecting Groups Using PPTS as an Acid Catalyst


Typical procedure :PPTS catalyzed THP protection of (R)-(+)-glycidol
Pyridinium p-toluenesulfonate (PPTS) (1.00 g, 4.05 mmol) and 3,4-dihydro-2H-pyran (11.3 mL, 121.5 mmol) are added to a stirred solution of (R)-(+)-glycidol (6.00 g, 80.99 mmol) in dichloromethane (80 mL) at 0 ºC under argon atmosphere. After 6 h, aqueous NaHCO3 solution (60 mL) is added and the layers are separated. The aqueous layer is extracted with dichloromethane (3x50 mL). Combined organic layer is dried over MgSO4, filtered, and concentrated in vacuo. The crude mixture is purified by column chromatography (EtOAc:hexane = 1:5) to give the desired product (9.22 g, 72%).


PPTS Catalyzed Hydrolysis of Dioxolane-type Acetals


PubMed Literature

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