Description

Trisodium 8-[(7-Amino-1-Hydroxy-3-Sulphonato-2-Naphthyl)Azo]-5-[[4-(Phenylazo)-7-Sulphonatonaphthyl]Azo]Naphthalene-2-Sulphonate is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex, multi-sulfonated structure provides excellent solubility and binding properties, making it a critical precursor for the synthesis of high-performance dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vivid, stable colors with enhanced fastness properties.

Application

• Primary Intermediate for Reactive Dyes: Key building block for synthesizing high-quality reactive dyes used in cotton and cellulose fiber dyeing.
• Textile Industry: Used in the production of dyes for wool, silk, and nylon, offering good wash and light fastness.
• Ink Manufacturing: Serves as a precursor for pigments in printing inks, especially for packaging and security applications.
• Leather Coloring: Employed in the synthesis of dyes for the leather tanning and finishing industry.
• Paper Dyeing: Used in the manufacture of dyes for coloring paper and paperboard products.
• Research & Development: Serves as a standard or intermediate in chemical research for developing new chromophores and functional materials.

Basic Information

Item	Details
Product Name	Trisodium 8-[(7-Amino-1-Hydroxy-3-Sulphonato-2-Naphthyl)Azo]-5-[[4-(Phenylazo)-7-Sulphonatonaphthyl]Azo]Naphthalene-2-Sulphonate
CAS No.	10134-33-5
Molecular Formula	C32H18N6Na3O11S3
Molecular Weight	852.67 g/mol
Synonyms	Acid Black 172; C.I. 172155; Trisodium 8-[(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-5-[(4-phenylazo-7-sulphonato-1-naphthyl)azo]naphthalene-2-sulphonate; 1,5-Naphthalenedisulfonic acid, 8-[(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-5-[(4-(phenylazo)-7-sulfo-1-naphthalenyl)azo]-, trisodium salt; Acid Black 172, trisodium salt; Azo dye intermediate 172155; Reactive dye intermediate
EINECS	Contact for details

Quality Control

Our Trisodium 8-[(7-Amino-1-Hydroxy-3-Sulphonato-2-Naphthyl)Azo]-5-[[4-(Phenylazo)-7-Sulphonatonaphthyl]Azo]Naphthalene-2-Sulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure high purity, consistent composition, and batch-to-batch reliability. We provide comprehensive Certificates of Analysis (COA) detailing key parameters such as assay, impurity profile, and solubility. Our quality commitment ensures the material meets the stringent requirements for use in sensitive dye synthesis applications.

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). Keep away from strong oxidizing agents. The product is hygroscopic; ensure the container is sealed after each use to minimize moisture absorption.

Specification

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

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