Description

4-Toluenesulfonic acid pyridinium salt is a versatile organic salt widely used as a catalyst and reagent in synthetic chemistry. Its primary value lies in its role as a mild and efficient acid catalyst, particularly in esterification and protection/deprotection reactions where stronger acids may cause unwanted side reactions. This compound is essential for researchers and manufacturers in the pharmaceutical, agrochemical, and fine chemical industries seeking controlled and selective reaction conditions.

Application

• Catalyst for esterification and transesterification reactions in fine chemical synthesis.
• Reagent for the protection and deprotection of functional groups, such as alcohols, in multi-step organic syntheses.
• Acid catalyst in the production of pharmaceutical intermediates and active pharmaceutical ingredients (APIs).
• Use in polymer chemistry as a curing agent or catalyst for resin formulations.
• Employed in academic and industrial research laboratories for method development and scale-up studies.
• Potential use in the synthesis of dyes, pigments, and other specialty organic compounds.

Basic Information

Product Name	4-Toluenesulfonic acid pyridinium salt
CAS No.	14265-88-4
Molecular Formula	C12H13NO3S
Molecular Weight	251.30 g/mol
Synonyms	Pyridinium p-toluenesulfonate; PPTS; p-Toluenesulfonic acid pyridinium salt; Pyridine p-toluenesulfonate; 4-Methylbenzenesulfonic acid pyridinium salt; Pyridinium tosylate; Tosic acid pyridinium salt; Pyridinium 4-methylbenzenesulfonate
EINECS	Contact for details

Quality Control

Our 4-Toluenesulfonic acid pyridinium salt is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing specifications such as assay, moisture content, and residue on ignition are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Melting Point	115 - 120 °C
Heavy Metals	≤ 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.