Description

2-Sulfoisonicotinic Acid is a versatile sulfonated pyridine derivative, serving as a key multifunctional intermediate in advanced organic synthesis. Its value lies in the unique combination of a carboxylic acid and a sulfonic acid group on the pyridine ring, enabling its use in creating water-soluble compounds and functional materials. This product is essential for research and production in the pharmaceutical, agrochemical, and specialty chemical industries, where it is utilized to introduce sulfonic acid functionality and enhance solubility.

Application

• Pharmaceutical Intermediate: A crucial building block for synthesizing active pharmaceutical ingredients (APIs), particularly those requiring enhanced water solubility or specific ionic characteristics.
• Agrochemical Synthesis: Used in the production of modern herbicides, fungicides, and plant growth regulators, where the sulfonic acid group can improve systemic activity and formulation properties.
• Ligand and Chelating Agent: Functions as a precursor for creating specialized ligands in catalysis and metal complexation processes due to its multiple coordination sites.
• Dye and Pigment Intermediate: Employed in the synthesis of water-soluble dyes, optical brighteners, and specialty pigments.
• Polymer Modification: Acts as a monomer or modifier to introduce sulfonate groups into polymers, improving hydrophilicity and anti-static properties.
• Research & Development: A valuable reagent in academic and industrial R&D for exploring new chemical entities and reaction pathways in heterocyclic chemistry.

Basic Information

Product Name	2-Sulfoisonicotinic Acid
CAS No.	18616-07-4
Molecular Formula	C6H5NO5S
Molecular Weight	203.17 g/mol
Synonyms	2-Pyridinesulfonic acid, 4-carboxy-; 4-Carboxy-2-pyridinesulfonic acid; Isonicotinic acid, 2-sulfo-; 2-Sulfo-4-pyridinecarboxylic acid; 2-Sulfonic isonicotinic acid; 2-Sulfoisonicotinate; 2-Sulfo-4-carboxypyridine
EINECS	Contact for details

Quality Control

Our 2-Sulfoisonicotinic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. We provide detailed Certificates of Analysis (COA) that include results from HPLC, NMR, and titration methods, confirming compliance with agreed specifications. Our quality commitment supports applications requiring high-purity intermediates, including cGMP manufacturing for pharmaceutical development.

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). This compound is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture. Store away from 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	≤ 1.0%
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.