Description

4-Ethoxy-5-Hydroxynaphthalene-2,7-Disulphonic Acid is a specialized naphthalene-based disulphonic acid derivative, serving as a critical intermediate in the synthesis of high-value dyes and pigments. Its molecular structure, featuring both ethoxy and hydroxyl substituents, provides unique reactivity and solubility properties essential for creating vibrant and stable colorants. This compound is primarily utilized by manufacturers in the dye and pigment, pharmaceutical, and advanced material research sectors who require precise chemical building blocks for complex synthesis.

Application

• Dye and Pigment Intermediate: A key precursor in the synthesis of azo dyes, acid dyes, and other complex organic colorants, contributing to color fastness and brilliance.
• Pharmaceutical Synthesis: Used as a building block in the research and development of active pharmaceutical ingredients (APIs) and diagnostic agents.
• Chemical Research: Employed in academic and industrial R&D for studying sulfonation reactions and developing novel aromatic compounds.
• Specialty Chemical Production: Serves as an intermediate for manufacturing surfactants, dispersants, and other functional chemicals that benefit from its sulfonic acid groups.
• Analytical Reagent: Can be used as a standard or reagent in analytical chemistry for method development and calibration.

Basic Information

Product Name	4-Ethoxy-5-Hydroxynaphthalene-2,7-Disulphonic Acid
CAS No.	6837-94-1
Molecular Formula	C₁₂H₁₂O₉S₂
Molecular Weight	388.35 g/mol
Synonyms	5-Hydroxy-4-ethoxynaphthalene-2,7-disulfonic acid; 4-Ethoxy-5-hydroxy-2,7-naphthalenedisulfonic acid; 2,7-Naphthalenedisulfonic acid, 4-ethoxy-5-hydroxy-; 4-Ethoxy-5-hydroxynaphthalene-2,7-disulfonic acid; 5-Hydroxy-4-ethoxynaphthalene-2,7-disulfonate; NSC 403119
EINECS	Contact for details

Quality Control

Every batch of 4-Ethoxy-5-Hydroxynaphthalene-2,7-Disulphonic Acid is manufactured and tested under a strict quality management system. Our products undergo rigorous quality testing to ensure compliance with industry standards. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Off-white to light brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 3.0%

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