Description

Sodium 1,4-Dihydroxy-2-Naphthalenesulfonate is a high-purity organic salt derived from naphthalene, serving as a versatile intermediate and functional additive. Its value lies in its dual functionality, combining the sulfonate group's water-solubility and surfactant properties with the reactivity of the dihydroxy naphthalene core. This compound is essential for manufacturers in the dye, pharmaceutical, and specialty chemical industries seeking reliable synthesis and performance.

Application

• Dye and Pigment Intermediate: A key precursor in the synthesis of acid dyes, reactive dyes, and lake pigments, contributing to color strength and stability.
• Pharmaceutical Synthesis: Used as a building block or solubilizing agent in the production of certain APIs (Active Pharmaceutical Ingredients) and diagnostic agents.
• Chemical Research & Development: Serves as a standard or reagent in organic synthesis and analytical chemistry laboratories.
• Surfactant and Dispersant: Functions as an anionic surfactant or dispersing agent in specialty formulations and industrial processes.
• Photographic Chemicals: Employed in certain photographic developers and related chemical formulations.
• Corrosion Inhibitor: Acts as a component in formulations designed to prevent corrosion in aqueous systems.

Basic Information

Product Name	Sodium 1,4-Dihydroxy-2-Naphthalenesulfonate
CAS No.	7110-75-0
Molecular Formula	C₁₀H₇NaO₅S
Molecular Weight	262.21 g/mol
Synonyms	1,4-Dihydroxy-2-naphthalenesulfonic Acid Sodium Salt; 2-Naphthalenesulfonic Acid, 1,4-dihydroxy-, Sodium Salt; Sodium 1,4-Dihydroxynaphthalene-2-sulfonate; 1,4-Dihydroxynaphthalene-2-sulfonic Acid Sodium Salt; Naphthol Sulfonate S; Armourite; Chromotropic Acid Sodium Salt (Note: Often associated but not identical; a common related compound).
EINECS	230-450-5

Quality Control

Our Sodium 1,4-Dihydroxy-2-Naphthalenesulfonate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for industrial and research applications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and consistency.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling.

Specification

Item	Specification
Appearance	Off-white to light yellow crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition (Sulfated Ash)	Contact for details
pH (1% Solution)	Contact for details

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