Description

7-Hydroxynaphthalene-1-Sulphonic Acid is a key aromatic sulfonic acid derivative, serving as a versatile intermediate in the synthesis of dyes, pigments, and other fine chemicals. Its value lies in its bifunctional structure, featuring both a hydroxyl and a sulfonic acid group, which allows for selective reactions and modifications. This compound is essential for manufacturers in the dye and pigment industry, as well as for research and development in organic synthesis and specialty chemical production.

Application

• Dye and Pigment Intermediate: A crucial building block for the synthesis of azo dyes, acid dyes, and other colorants.
• Coupling Agent: Used in diazotization and coupling reactions to produce complex dye molecules.
• Chemical Synthesis: Serves as a starting material or intermediate in the production of pharmaceuticals and agrochemicals.
• Research & Development: Employed in academic and industrial labs for developing new organic compounds and materials.
• Photographic Chemicals: Can be used in the formulation of certain photographic developers and sensitizers.
• Corrosion Inhibitor Precursor: Potential use in synthesizing compounds for metal surface treatment and protection.

Basic Information

Product Name	7-Hydroxynaphthalene-1-Sulphonic Acid
CAS No.	132-57-0
Molecular Formula	C10H8O4S
Molecular Weight	224.23 g/mol
Synonyms	7-Hydroxy-1-naphthalenesulfonic Acid; 1-Naphthol-7-sulfonic Acid; 7-Hydroxynaphthalene-1-sulfonic Acid; NSC 40326; 7-Hydroxy-1-naphthalenesulphonic Acid; 7-Hydroxynaphthalenesulphonic Acid; 7-Hydroxynaphthalenesulfonic Acid; 1-Naphthol-7-sulphonic Acid
EINECS	205-071-9

Quality Control

Our 7-Hydroxynaphthalene-1-Sulphonic Acid is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise chemical and physical specifications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and compliance with your requirements.

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, strong bases, and incompatible materials.

Specification

Item	Specification
Appearance	Off-white to light tan powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
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.