Pyridinium p-Toluenesulfate

• CAT Number: R016869
• CAS Number: 24057-28-1
• Molecular Formula: C12H13NO3S
• Molecular Weight: 251.30
• Purity: ≥95%
• Synonyms: 4-Methylbenzenesulfonic Acid compd. with Pyridine (1:1); Pyridine, 4-methylbenzenesulfonate; Pyridine, p-Toluenesulfonate; 4-Methylbenzenesulfonic Acid Pyridinium Salt; PPTS; Pyridinium 4-Toluenesulfonate; Pyridinium p-Toluenesulfonate; Pyridinium p-
• Storage: Store at RT
• IUPAC Name: 4-methylbenzenesulfonate;pyridin-1-ium
• InChI: InChI=1S/C7H8O3S.C5H5N/c1-6-2-4-7(5-3-6)11(8,9)10;1-2-4-6-5-3-1/h2-5H,1H3,(H,8,9,10);1-5H
• InChIKey: ZDYVRSLAEXCVBX-UHFFFAOYSA-N
• SMILES: CC1=CC=C(C=C1)S(=O)(=O)[O-].C1=CC=[NH+]C=C1

Pyridinium p-toluenesulfate (Cat No.: R016869) is a mild, crystalline, and non-volatile organic acid commonly used as a catalyst in organic synthesis. It is formed by the reaction of pyridine with p-toluenesulfonic acid, resulting in a stable pyridinium salt. PPTS is particularly valued for catalyzing acid-sensitive reactions such as acetal and ketal hydrolysis, esterifications, and transesterifications under gentle conditions. Unlike stronger mineral acids, it provides good control in selective transformations, making it suitable for use in complex molecule and natural product synthesis.