p-Toluenesulfonic Acid Monohydrate | CAS 6192-52-5

Product Name: p-Toluenesulfonic Acid Monohydrate

Abbreviation: PTSA Monohydrate

CAS No.: 6192-52-5

Molecular Formula: C₇H₈O₃S·H₂O

Product Category: Organic Strong Acid / Catalyst / Pharmaceutical and Fine Chemical Raw Material

Product Overview

p-Toluenesulfonic acid monohydrate (CAS 6192-52-5) is a strong organic sulfonic acid characterized by its strong acidity, high stability, non-volatility, and non-oxidizing properties towards metals. Compared to inorganic acids, it exhibits better selectivity and controllability in organic synthesis.

This product is widely used in the synthesis of pharmaceutical intermediates, esterification and condensation reactions, resins and polymer materials, dyes, coatings, and fine chemical catalytic systems. It is one of the commonly used organic acid catalysts in industry and laboratories.

Technical Data Sheet

Main Application Areas:

1. Organic Synthesis Catalysts

Used in esterification, etherification, condensation, and rearrangement reactions.

A substitute for strong inorganic acids such as sulfuric acid and hydrochloric acid.

2. Pharmaceutical and Pesticide Intermediates

Used in the synthesis of various active pharmaceutical ingredients and functional molecules.

Mild reaction conditions and fewer side reactions.

3. Resins and Polymer Materials

Used as an acid catalyst in polymerization reactions.

Improves reaction efficiency and product consistency.

4. Dyes, Fragrances, and Coatings

Used as a stable acid source in fine chemical synthesis.

Improves yield and product purity.

Product Core Advantages:

✔ Strong acidity but non-volatile, ensuring high safety

✔ Does not corrode metal equipment, suitable for industrial scale-up

✔ High purity (≥99%), consistent batch quality

✔ Easily soluble in water and organic solvents

✔ Can replace various inorganic acid systems

Supply & Company Strengths

🔹 Many years of experience in exporting organic acids and catalysts

🔹 Strict quality testing and batch control

🔹 Provision of COA, MSDS, and TDS documents

🔹 Support for customized packaging and technical assistance

🔹 Stable inventory and flexible delivery times

Packaging & Storage

 FAQ – Frequently Asked Questions 

Q1: What is p-Toluenesulfonic Acid Monohydrate used for?
A: It is mainly used as an organic acid catalyst in esterification and condensation reactions.

Q2: Why choose PTSA instead of inorganic acids?
A: PTSA is non-volatile, less corrosive, and offers better reaction control.

Q3: What purity grade is available?
A: Standard industrial grade purity is ≥99%.

Q4: Can you supply bulk quantities?
A: Yes, bulk supply and customized packaging are available.

Q5: How should this product be stored?
A: Store in a cool, dry place away from moisture.