Description

1-Naphthol-5-Sulfonic Acid is a key aromatic sulfonic acid derivative, serving as a versatile intermediate in the synthesis of dyes, pigments, and other fine chemicals. Its molecular structure, featuring both a phenolic hydroxyl and a sulfonic acid group, makes it a valuable building block for creating compounds with specific color and solubility properties. This product is essential for manufacturers in the dye and pigment industries, as well as for research and development in organic synthesis.

Application

• Dye and Pigment Intermediate: A crucial precursor in the manufacture of azo dyes, acid dyes, and lake pigments.
• Chemical Synthesis: Used as a building block for synthesizing more complex organic molecules in pharmaceutical and agrochemical research.
• Textile Industry: Employed in processes for dyeing and printing textiles, leather, and paper.
• Analytical Reagent: Can serve as a reagent or standard in certain analytical chemistry applications.
• Photographic Chemicals: Historically used in the production of certain photographic developers and chemicals.
• Corrosion Inhibitor Precursor: Potential use in the formulation of specialty corrosion inhibitors for industrial applications.

Basic Information

Product Name	1-Naphthol-5-Sulfonic Acid
CAS No.	117-59-9
Molecular Formula	C10H8O4S
Molecular Weight	224.23 g/mol
Synonyms	5-Hydroxy-1-naphthalenesulfonic acid; 1-Naphthol-5-sulphonic acid; 5-Sulfo-1-naphthol; NSC 40326; 1-Hydroxynaphthalene-5-sulfonic acid; 1,5-Naphtholsulfonic acid; L Acid (obsolete); Laurent's Acid (obsolete)
EINECS	204-202-3

Quality Control

Our 1-Naphthol-5-Sulfonic Acid is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise chemical and physical specifications. A Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and compliance with your technical 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. The product may be hygroscopic; ensure containers are sealed tightly after use to minimize moisture absorption.

Specification

Item	Specification
Appearance	Off-white to light tan crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%, Total impurities ≤ 2.0%

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