Description

Disodium 5-Hydroxy-6-[(4-Sulphonatonaphthyl)Azo]Naphthalenesulphonate is a high-purity, water-soluble azo dye intermediate. This compound is valued for its excellent chromophoric properties and stability, making it a critical building block for synthesizing specific, high-performance dyes and pigments. It is primarily sought after by manufacturers in the textile, ink, and specialty chemical industries for producing vivid and durable colorants.

Application

• Primary Intermediate for Azo Dyes: Serves as a key precursor in the synthesis of acid dyes and direct dyes for textile fibers like wool, silk, and nylon.
• Pigment Manufacturing: Used in the production of lake pigments and other colorants for inks and coatings.
• Specialty Chemical Synthesis: Acts as a functional intermediate in the creation of complex dyes for paper, leather, and food colorants (where compliant grades are used).
• Research & Development: Employed in chemical R&D for developing new chromophores and studying azo compound chemistry.
• Analytical Reagents: Can be utilized as a standard or reagent in analytical chemistry and quality control laboratories.

Basic Information

Product Name	Disodium 5-Hydroxy-6-[(4-Sulphonatonaphthyl)Azo]Naphthalenesulphonate
CAS No.	3746-79-0
Molecular Formula	C₂₀H₁₂N₂Na₂O₈S₂
Molecular Weight	518.42 g/mol
Synonyms	Acid Orange 20 (C.I. 14600); 6-[(4-Sulfo-1-naphthyl)azo]-5-hydroxynaphthalene-2-sulfonic acid disodium salt; 5-Hydroxy-6-[(4-sulfo-1-naphthyl)azo]-2-naphthalenesulfonic acid disodium salt; Disodium 5-hydroxy-6-[(4-sulfo-1-naphthalenyl)azo]-2-naphthalenesulfonate; 1-Naphthalenesulfonic acid, 6-[(4-sulfo-1-naphthalenyl)azo]-5-hydroxy-, disodium salt; C.I. Acid Orange 20; Tropaeolin O; Orange IV
EINECS	223-148-8

Quality Control

Our Disodium 5-Hydroxy-6-[(4-Sulphonatonaphthyl)Azo]Naphthalenesulphonate is manufactured under a stringent quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and chemical composition. 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 area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 30.0%
Water Solubility	Freely soluble

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