Description

Trisodium 5-Amino-4-Hydroxy-3-[(2-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its primary value lies in its role as a key precursor for synthesizing a range of vibrant and stable acid dyes and reactive dyes. This compound is essential for manufacturers in the textile, leather, and paper industries seeking to produce high-quality coloring agents with excellent fastness properties.

Application

• Primary Intermediate for Acid Dyes: Serves as a crucial building block in the production of acid dyes used for coloring nylon, wool, silk, and other polyamide fibers.
• Synthesis of Reactive Dyes: Used in the manufacture of reactive dyes for cotton and cellulose fibers, providing strong covalent bonds for superior wash-fastness.
• Leather Dyeing: Employed in the formulation of dyes for leather finishing, offering deep, uniform shades.
• Paper Coloring: Utilized in the production of dyes for specialty paper and paperboard products.
• Ink Formulation: Acts as a colorant component in the manufacture of certain inks for industrial printing applications.
• Research & Development: Used in chemical research labs for developing new dye structures and studying azo dye chemistry.

Basic Information

Product Name	Trisodium 5-Amino-4-Hydroxy-3-[(2-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	16768-46-0
Molecular Formula	C16H9N3Na3O10S3
Molecular Weight	599.41 g/mol
Synonyms	5-Amino-4-hydroxy-3-[(2-sulfophenyl)azo]-2,7-naphthalenedisulfonic acid, trisodium salt; C.I. Acid Red 186; Trisodium 5-amino-4-hydroxy-3-(2-sulfophenyl)azo)naphthalene-2,7-disulfonate; Acid Red 186; 2,7-Naphthalenedisulfonic acid, 5-amino-4-hydroxy-3-((2-sulfophenyl)azo)-, trisodium salt; Azo dye intermediate 16768-46-0; 3-[(2-Carboxyphenyl)azo]-4,5-dihydroxynaphthalene-2,7-disulfonic acid trisodium salt (related form).
EINECS	240-822-8

Quality Control

Our production of Trisodium 5-Amino-4-Hydroxy-3-[(2-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with customer specifications. Certificates of Analysis (COA) detailing assay, impurity profile, and physical characteristics are provided with each shipment to guarantee traceability and quality assurance for your manufacturing processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents. The product is hygroscopic (moisture-sensitive); ensure containers are sealed after use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark red to brown powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Sulfated Ash	≤ 30.0%
Solubility (in Water)	Clear solution
Heavy Metals (as Pb)	≤ 20 ppm

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