Description

4-Hydroxynaphthalene-2-Sulphonamide is a specialized organic intermediate featuring both a phenolic hydroxyl and a sulphonamide functional group on a naphthalene backbone. This unique structure makes it a valuable building block for synthesizing dyes, pigments, and other functional chemicals. It is primarily sought after by manufacturers in the dyestuff, pharmaceutical, and agrochemical industries for research and production purposes.

Application

• Dye and Pigment Intermediate: A key precursor in the synthesis of acid dyes, reactive dyes, and organic pigments, particularly for coloring textiles, leather, and paper.
• Pharmaceutical Synthesis: Serves as a crucial building block for creating sulfonamide-based active pharmaceutical ingredients (APIs) and other pharmacologically active molecules.
• Agrochemical Manufacturing: Used in the production of certain herbicides, fungicides, and plant growth regulators where the sulphonamide moiety is required for biological activity.
• Chemical Research & Development: Employed in organic synthesis laboratories for developing new compounds with specific optical or chemical properties.
• Functional Material Production: Potential use in the synthesis of polymers, liquid crystals, or other advanced materials requiring a naphthalene-based sulfonamide structure.

Basic Information

Product Name	4-Hydroxynaphthalene-2-Sulphonamide
CAS No.	116-64-3
Molecular Formula	C₁₀H₉NO₃S
Molecular Weight	223.25 g/mol
Synonyms	2-Hydroxy-1-naphthalenesulfonamide; 1-Naphthol-2-sulfonamide; 4-Hydroxy-2-naphthalenesulfonamide; 2-Sulfamoyl-1-naphthol; NSC 403697; 1-Naphthol-2-sulphonic acid amide; 4-Hydroxy-2-naphthalenesulphonamide
EINECS	204-151-5

Quality Control

Our 4-Hydroxynaphthalene-2-Sulphonamide is produced under strict quality management protocols. Every batch undergoes comprehensive analytical testing to ensure it meets the required chemical and physical specifications. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to guarantee traceability and consistency for your critical applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents and incompatible materials.

Specification

Item	Specification
Appearance	Off-white to light yellow crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	215 - 220 °C
Loss on Drying	≤ 0.5%
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.