Description

Trisodium 4-Amino-3-[(2,5-Dichloro-4-Sulphonatophenyl)Azo]-5-Hydroxy-6-(Phenylazo)Naphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate known for its complex molecular structure and functional sulfonate groups. This compound is critical for achieving specific, vibrant hues and enhanced fastness properties in advanced dye synthesis. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance colorants and pigments.

Application

• Primary intermediate for the synthesis of high-grade, polyazo direct dyes and reactive dyes for textiles.
• Key component in manufacturing specialized pigments and colorants for printing inks.
• Used in the production of colorants for paper and leather goods.
• Acts as a functional intermediate in research and development of novel chromophores for optical applications.
• Employed in the formulation of dyes for biological staining in histology and microscopy.
• Potential use in the development of functional dyes for non-textile applications, such as sensors.

Basic Information

Product Name	Trisodium 4-Amino-3-[(2,5-Dichloro-4-Sulphonatophenyl)Azo]-5-Hydroxy-6-(Phenylazo)Naphthalene-2,7-Disulphonate
CAS No.	81064-49-5
Molecular Formula	C22H11Cl2N5Na3O11S3
Molecular Weight	Contact for details
Synonyms	4-Amino-3-[(2,5-dichloro-4-sulfophenyl)azo]-5-hydroxy-6-(phenylazo)-2,7-naphthalenedisulfonic acid trisodium salt; C.I. Direct Brown 2; Direct Brown 2; Direct Brown 2, trisodium salt; Trisodium 4-amino-3-[(2,5-dichloro-4-sulfonatophenyl)diazenyl]-5-hydroxy-6-(phenyldiazenyl)naphthalene-2,7-disulfonate; 81064-49-5; Direct Brown 2 (C.I. 22311); C.I. 22311
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high chemical purity. Quality is verified through advanced analytical techniques including HPLC and spectrophotometry. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory compliance needs.

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 (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product performance and handling.

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	Max. 20 ppm

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