Description

4-Chloro-3-Pyridinesulfonic Acid is a versatile and high-purity chemical intermediate essential for advanced organic synthesis. Its unique structure, combining a halogenated pyridine ring with a sulfonic acid group, makes it a critical building block for creating complex molecules with specific functionalities. This compound is particularly valuable for research and development chemists and process engineers in the pharmaceutical and agrochemical industries, where it is used to synthesize active ingredients and novel compounds.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for drugs targeting the central nervous system and other therapeutic areas.
• Agrochemical Synthesis: Used in the development of modern pesticides, herbicides, and fungicides, contributing to novel modes of action.
• Ligand and Catalyst Development: Serves as a building block for creating specialized ligands used in metal-catalyzed cross-coupling reactions and other catalytic processes.
• Material Science Research: Employed in the synthesis of functionalized polymers, dyes, and advanced organic materials.
• Chemical Research & Development: A valuable reagent for medicinal chemistry and process chemistry in both academic and industrial R&D settings.

Basic Information

Product Name	4-Chloro-3-Pyridinesulfonic Acid
CAS No.	51498-38-5
Molecular Formula	C5H4ClNO3S
Molecular Weight	193.61 g/mol
Synonyms	3-Pyridinesulfonic acid, 4-chloro-; 4-Chloro-3-pyridylsulfonic acid; 4-Chloropyridine-3-sulfonic acid; 4-Chloro-3-sulfopyridine; 4-Chloro-3-pyridinesulphonic acid; 4-Chloro-3-sulfonic acid pyridine; 4-Chloro-pyridine-3-sulfonic acid
EINECS	Contact for details

Quality Control

Our 4-Chloro-3-Pyridinesulfonic Acid is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot is subjected to rigorous analytical testing, including HPLC for assay and impurity profiling. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and specific tests is provided with every shipment. We support cGMP compliance for pharmaceutical applications and can tailor specifications to meet your project requirements.

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 tightly sealed after opening to prevent degradation from atmospheric moisture. Keep away from strong bases and incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm

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