Description

Sodium 4,5-Dihydroxynaphthalene-1-Sulphonate is a high-purity, water-soluble sodium salt of a dihydroxynaphthalene sulphonic acid derivative, serving as a versatile intermediate and functional additive. Its core value lies in its dual phenolic and sulphonate functionality, which provides excellent chelating, dispersing, and coupling properties in complex formulations. This compound is essential for manufacturers in the dye and pigment, pharmaceutical, and specialty chemical industries seeking to enhance product performance and process stability.

Application

• Dye and Pigment Intermediate: A key precursor in the synthesis of azo dyes, acid dyes, and reactive dyes, contributing to color fastness and brightness.
• Pharmaceutical Synthesis: Used as a building block or chelating agent in the production of certain active pharmaceutical ingredients (APIs).
• Metal Chelation and Water Treatment: Functions as a chelating agent to control metal ions in industrial water systems and boiler feed water.
• Concrete Admixture: Acts as a dispersant and water-reducing agent in high-performance concrete formulations.
• Textile Auxiliary: Employed as a leveling agent or dispersant in dyeing processes to ensure uniform color uptake.
• Analytical Reagent: Serves as a reagent or standard in analytical chemistry for colorimetric determination of specific metal ions.
• Photographic Chemical: Used in the formulation of certain photographic developers and processing solutions.

Basic Information

Item	Details
Product Name	Sodium 4,5-Dihydroxynaphthalene-1-Sulphonate
CAS No.	54179-01-0
Molecular Formula	C10H7NaO5S
Molecular Weight	262.21 g/mol
Synonyms	1,5-Dihydroxynaphthalene-4-sulfonic Acid Sodium Salt; 4,5-Dihydroxy-1-naphthalenesulfonic Acid Sodium Salt; 1-Naphthalenesulfonic Acid, 4,5-dihydroxy-, Monosodium Salt; Sodium 4,5-Dihydroxy-1-naphthalenesulfonate; 4,5-Dihydroxynaphthalene-1-sulfonic Acid Sodium Salt; 5-Hydroxy-1-naphthol-4-sulfonic Acid Sodium Salt
EINECS	Contact for details

Quality Control

Our Sodium 4,5-Dihydroxynaphthalene-1-Sulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, identity, and performance. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications is provided with each shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at 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. For long-term storage, consider using desiccants or storing under an inert atmosphere to minimize oxidation.

Specification

Item	Specification
Appearance	Off-white to light tan powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulphated Ash	22.0 - 26.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear, complete solution

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