Description

Disodium 7-Amino-4-Hydroxy-3-[(2-Hydroxy-5-Sulphonatophenyl)Azo]Naphthalene-2-Sulphonate is a high-purity, water-soluble azo dye intermediate essential for producing vibrant and stable colorants. Its molecular structure provides excellent chromophore properties, making it a critical building block for specialized dyes and pigments. This compound is primarily required by manufacturers in the textile, ink, and specialty chemical industries seeking consistent quality for demanding applications.

Application

• Primary Intermediate for Azo Dyes: Key precursor for synthesizing acid dyes, direct dyes, and reactive dyes used in textile coloring.
• Specialty Ink Formulations: Used in the production of high-performance inks for jet printing and security applications.
• Biological Staining Agent: Employed in the preparation of histological stains for laboratory and diagnostic use.
• Functional Colorant for Polymers: Imparts color to specialized plastics and coatings where lightfastness is required.
• Research & Development: Serves as a standard or reagent in chemical research for developing new chromogenic compounds.
• Paper Coloring: Used in the manufacture of high-grade colored papers.

Basic Information

Product Name	Disodium 7-Amino-4-Hydroxy-3-[(2-Hydroxy-5-Sulphonatophenyl)Azo]Naphthalene-2-Sulphonate
CAS No.	93805-44-8
Molecular Formula	C₁₆H₁₁N₃Na₂O₉S₂
Molecular Weight	515.38 g/mol
Synonyms	7-Amino-4-hydroxy-3-[(2-hydroxy-5-sulfophenyl)azo]naphthalene-2-sulfonic acid disodium salt; Acid Black 210; C.I. 28440; Disodium 7-amino-4-hydroxy-3-[(2-hydroxy-5-sulfonatophenyl)diazenyl]naphthalene-2-sulfonate; 2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-[(2-hydroxy-5-sulfophenyl)azo]-, disodium salt; Azo dye intermediate 93805-44-8; Mordant Black 17 (related class)
EINECS	Contact for details

Quality Control

Our Disodium 7-Amino-4-Hydroxy-3-[(2-Hydroxy-5-Sulphonatophenyl)Azo]Naphthalene-2-Sulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical properties is provided with each shipment to guarantee traceability and compliance.

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 nature, the container must be kept tightly sealed after initial use to prevent moisture absorption, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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