Description

2-Hydroxypyridine-3-Sulfonic Acid is a versatile heterocyclic sulfonic acid derivative that serves as a key synthetic intermediate and functional building block. Its unique structure, combining a pyridine ring with both hydroxyl and sulfonic acid groups, makes it valuable for introducing water-solubility and metal-chelating properties into target molecules. This compound is primarily sought by researchers and manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries for applications in drug synthesis, catalyst design, and as a precursor for advanced materials.

Application

• Pharmaceutical Intermediate: A crucial building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for drugs targeting the central nervous system or possessing chelating properties.
• Agrochemical Synthesis: Used in the production of advanced herbicides, fungicides, and plant growth regulators where its heterocyclic structure contributes to biological activity.
• Metal Chelating Agent & Catalyst Ligand: Functions as a ligand for transition metal catalysts in organic synthesis and as a chelating agent in industrial processes and water treatment formulations.
• Dye & Pigment Manufacturing: Serves as an intermediate in the synthesis of complex dyes, pigments, and optical brighteners, contributing to color fastness and solubility.
• Corrosion Inhibitor Formulation: Incorporated into specialty chemical blends for metal surface treatment and corrosion protection due to its ability to form stable complexes with metal ions.
• Research & Development: A valuable reagent in academic and industrial R&D for exploring new heterocyclic chemistry, supramolecular assemblies, and functional polymers.

Basic Information

Product Name	2-Hydroxypyridine-3-Sulfonic Acid
CAS No.	6684-45-3
Molecular Formula	C5H5NO4S
Molecular Weight	175.16 g/mol
Synonyms	3-Pyridinesulfonic acid, 2-hydroxy-; 2-Hydroxy-3-pyridinesulfonic acid; 2-Hydroxynicotinic acid sulfonic acid; 3-Sulfopyridin-2-ol; 2-Pyridinol-3-sulfonic acid; 2-Hydroxypyridine-3-sulfonate; 2-Hydroxynicotinic acid sulfonate; 6684-45-3
EINECS	229-758-5

Quality Control

Our 2-Hydroxypyridine-3-Sulfonic Acid is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise specifications for identity, purity, and impurity profiles. We provide a detailed Certificate of Analysis (COA) with each shipment, documenting key parameters such as assay, related substances, and residual solvents. Our quality commitment supports applications requiring high-purity intermediates for regulated industries.

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) and should be handled in a dry environment to prevent degradation. Keep 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	≤ 2.0%
Residue on Ignition (Sulfated Ash)	≤ 0.1%
Related Substances (HPLC)	Total impurities ≤ 2.0% Any single impurity ≤ 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.