Description

3-Sulfoisonicotinic Acid is a versatile sulfonated derivative of isonicotinic acid, serving as a key multifunctional intermediate in advanced chemical synthesis. Its value lies in the combination of a carboxylic acid group and a sulfonic acid group on a pyridine ring, enabling its use in the creation of water-soluble compounds and functional materials. This product is essential for manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries seeking to introduce sulfonate functionality for enhanced solubility or biological activity.

Application

• Pharmaceutical Intermediate: Crucial 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 and fungicides, where the sulfonate group can improve systemic activity and environmental profile.
• Ligand for Metal Complexation: Acts as a chelating agent in catalytic systems and for metal ion separation processes due to its bifunctional acid groups.
• Dye and Pigment Manufacturing: Serves as a building block for water-soluble dyes and functional pigments, imparting ionic character and stability.
• Polymer Modification: Incorporated into polymers to introduce sulfonate groups, modifying properties like hydrophilicity, ion-exchange capacity, or adhesion.
• Research & Development: A valuable reagent in organic and medicinal chemistry research for exploring new molecular entities with tailored acid-base properties.

Basic Information

Product Name	3-Sulfoisonicotinic Acid
CAS No.	4833-93-6
Molecular Formula	C6H5NO5S
Molecular Weight	203.17 g/mol
Synonyms	3-Sulfoisonicotinic Acid; 3-Pyridinecarboxylic Acid, 6-Sulfo-; 6-Sulfonicotinic Acid; Isonicotinic-3-sulfonic Acid; 3-Carboxy-4-pyridinesulfonic Acid; 4-Pyridinesulfonic Acid-3-carboxylic Acid; 3-Sulfopyridine-4-carboxylic Acid
EINECS	225-408-9

Quality Control

Our 3-Sulfoisonicotinic Acid is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets high-purity standards suitable for synthesis and research applications. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, 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 absorption of atmospheric moisture, which can affect product quality and handling.

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 (Sulfated Ash)	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

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