Description

Quinoline-5-Sulphonic Acid is a specialized organic sulfonic acid derivative of the quinoline heterocycle, serving as a key synthetic intermediate and functional building block. Its value lies in its ability to introduce both sulfonic acid functionality and the quinoline moiety into target molecules, enabling the synthesis of compounds with tailored properties. This chemical is essential for researchers and manufacturers in the pharmaceutical, agrochemical, and dye industries, where it is used to create active ingredients, functional dyes, and advanced materials.

Application

• Pharmaceutical Intermediate: A crucial building block for synthesizing active pharmaceutical ingredients (APIs), particularly those requiring a sulfonated quinoline structure for enhanced solubility or biological activity.
• Agrochemical Synthesis: Used in the production of advanced herbicides, fungicides, and plant growth regulators, where the quinoline core contributes to efficacy.
• Dye and Pigment Manufacturing: Acts as a precursor for the synthesis of functional dyes, optical brighteners, and complex pigments, especially azo dyes and fluorescent markers.
• Corrosion Inhibitor Formulation: Incorporated into specialty chemical blends designed to protect metals in industrial cooling systems and processing equipment.
• Chemical Research & Development: Serves as a versatile reagent in organic synthesis for creating novel sulfonated heterocyclic compounds in academic and industrial R&D labs.
• Ligand for Metal Complexation: Utilized in analytical chemistry and catalysis as a chelating agent due to the electron-donating properties of the nitrogen and sulfonate groups.

Basic Information

Product Name	Quinoline-5-Sulphonic Acid
CAS No.	23261-58-7
Molecular Formula	C9H7NO3S
Molecular Weight	209.22 g/mol
Synonyms	5-Quinolinesulfonic Acid; Quinoline-5-sulfonic acid; 5-Sulfoquinoline; Quinoline-5-sulphonate; 8-Aza-1-naphthalenesulfonic acid; 5-Quinolylsulfonic acid; 1-Azanaphthalene-5-sulfonic acid; 23261-58-7
EINECS	Contact for details

Quality Control

Our Quinoline-5-Sulphonic Acid is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets high-purity standards and consistent specifications suitable for industrial and research applications. Certificates of Analysis (COA) documenting purity, identity, and impurity profiles 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, 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 properties.

Specification

Item	Specification
Appearance	Off-white to light yellow crystalline powder
Identification (IR)	Conforms
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.