Description

2-Hydroxy-5-Sulfopyridine-3-Carboxylic Acid CAS NO 334708-05-3 is a multifunctional heterocyclic compound featuring both sulfonic and carboxylic acid groups, making it a valuable intermediate for complex synthesis. Its unique structure provides excellent water solubility and chelating properties, which are critical for developing high-performance materials and active pharmaceutical ingredients. This chemical is essential for researchers and manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries seeking to create novel compounds with enhanced functionality.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of novel drug candidates, particularly those requiring water-soluble moieties or metal-chelating functionalities.
• Agrochemical Synthesis: Used in the production of advanced herbicides, fungicides, and plant growth regulators where its polar groups improve bioavailability and environmental compatibility.
• Dye & Pigment Manufacturing: Serves as a precursor for water-soluble dyes, optical brighteners, and high-performance pigments due to its sulfonic acid group.
• Metal Chelation & Catalysis: Acts as a ligand for metal ions in catalytic systems, wastewater treatment processes, and as a component in electroplating baths.
• Chemical Research & Development: A versatile reagent for organic synthesis, used in academic and industrial R&D to create new heterocyclic compounds and functional materials.
• Specialty Polymer Modification: Incorporated into polymer chains to impart hydrophilicity, ionic character, or specific binding sites for advanced material applications.

Basic Information

Product Name	2-Hydroxy-5-Sulfopyridine-3-Carboxylic Acid
CAS No.	334708-05-3
Molecular Formula	C6H5NO6S
Molecular Weight	219.17 g/mol
Synonyms	5-Sulfopyridine-2-ol-3-carboxylic acid; 3-Carboxy-2-hydroxy-5-sulfopyridine; 2-Hydroxy-5-sulfonicotinic acid; 2-Hydroxynicotinic acid-5-sulfonic acid; 5-Sulfo-2-hydroxynicotinic acid; Pyridine-3-carboxylic acid, 2-hydroxy-5-sulfo-; 2-Hydroxy-5-sulfopyridine-3-carboxylic acid (predominant tautomer)
EINECS	Contact for details

Quality Control

Every batch of 2-Hydroxy-5-Sulfopyridine-3-Carboxylic Acid is produced under a strict quality management system. Our products undergo rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure they meet precise customer specifications and industry standards. Certificates of Analysis (COA) documenting batch-specific results are available upon request to support your quality assurance and regulatory compliance needs.

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 product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and stability.

Specification

Item	Specification
Appearance	Off-white to light yellow crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (Sulfated Ash)	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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