Description

Trisodium 2-[[4-[(4-Amino-1-Naphthyl)Azo]-6-Sulphonato-1-Naphthyl]Azo]Benzene-1,4-Disulphonate is a high-purity, water-soluble azo dye intermediate known for its precise chemical structure and consistent performance. This compound is critical for manufacturers requiring reliable and vibrant colorants for demanding technical applications. It is primarily utilized by producers of dyes and pigments for textiles, inks, and specialty coatings where color fastness and chemical stability are paramount.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of high-performance, polyazo direct and reactive dyes.
• Textile Dyeing and Printing: Used in the production of dyes for coloring cotton, viscose, and other cellulose-based fibers, offering good wash and light fastness.
• Ink Manufacturing: Employed in the formulation of industrial and specialty printing inks, contributing to color intensity and stability.
• Paper Coloring: Applicable in the manufacture of dyes for high-grade paper products.
• Leather Dyeing: Used in the production of dyes for the leather tanning and finishing industry.
• Research & Development: Serves as a precise chemical standard and reagent in organic synthesis and color chemistry research laboratories.

Basic Information

Product Name	Trisodium 2-[[4-[(4-Amino-1-Naphthyl)Azo]-6-Sulphonato-1-Naphthyl]Azo]Benzene-1,4-Disulphonate
CAS No.	64346-74-3
Molecular Formula	C32H19N5Na3O9S3
Molecular Weight	799.66 g/mol
Synonyms	Direct Black 22 (sodium salt); C.I. 35435; 2-[[4-[(4-Amino-1-naphthyl)azo]-6-sulfo-1-naphthyl]azo]-1,4-benzenedisulfonic acid trisodium salt; Benzenedisulfonic acid, 2-[[4-[(4-amino-1-naphthyl)azo]-6-sulfo-1-naphthyl]azo]-, trisodium salt; Trisodium 4-amino-5-hydroxy-6-[[4'-[(4-amino-1-naphthyl)azo][1,1'-biphenyl]-4-yl]azo]-3,6-disulfonato-2,7-naphthalenedisulfonate (related isomer); Azo dye intermediate 64346-74-3.
EINECS	Contact for details

Quality Control

Our production of Trisodium 2-[[4-[(4-Amino-1-Naphthyl)Azo]-6-Sulphonato-1-Naphthyl]Azo]Benzene-1,4-Disulphonate adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity. Every lot is analyzed against rigorous in-house specifications, which typically include identity confirmation, assay, and impurity profiling. Certificates of Analysis (COA) documenting these results are provided to guarantee the material meets your technical requirements for synthesis and formulation.

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). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect purity and handling properties.

Specification

Item	Specification
Appearance	Dark brown to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	Max. 20 ppm
Related Substances (HPLC)	Total impurities: Max. 3.0%

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