Description

4-Pyridinesulphonic Acid is a versatile heterocyclic sulfonic acid derivative that serves as a critical building block in advanced organic synthesis. Its unique structure, combining a pyridine ring with a sulfonic acid group, makes it a valuable intermediate for creating complex molecules with tailored properties. This compound is essential for researchers and manufacturers in the pharmaceutical and agrochemical industries, where it is used to develop active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for drugs targeting the central nervous system or possessing antimicrobial properties.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and plant growth regulators, leveraging its heterocyclic core for biological activity.
• Ligand and Catalyst Preparation: Serves as a starting material for creating specialized ligands used in metal catalysis and coordination chemistry.
• Dye and Pigment Manufacturing: Acts as an intermediate in the synthesis of complex dyes, pigments, and optical brighteners.
• Corrosion Inhibitor Formulation: Incorporated into formulations designed to protect metals in industrial processes.
• Research & Development: A valuable reagent in academic and industrial R&D for exploring new chemical entities and reaction pathways.

Basic Information

Product Name	4-Pyridinesulphonic Acid
CAS No.	5402-20-0
Molecular Formula	C5H5NO3S
Molecular Weight	159.16 g/mol
Synonyms	Pyridine-4-sulfonic Acid; 4-Pyridylsulfonic Acid; 4-Pyridinesulfonic Acid; Isonicotinic Acid Sulfonic Acid Derivative; Picolinic Acid Sulfonic Acid Isomer; 4-PSA; 4-PySO3H
EINECS	226-463-1

Quality Control

Our 4-Pyridinesulphonic Acid is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC, NMR, and titration methods, to ensure identity, purity, and consistency. We provide a detailed Certificate of Analysis (COA) with every shipment, confirming compliance with agreed specifications. Our quality commitment supports applications requiring high-purity intermediates under cGMP or ISO 9001 frameworks.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed and under dry conditions to prevent degradation. Keep away from incompatible materials such as strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm

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