Description

6-[(2,4-diamino-5-sulphophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diamino-5-sulphophenyl)azo]-1-hydroxy-3-sulpho-2-naphthyl]azo]phenyl]amino]-3-sulphophenyl]azo]-4-hydroxynaphthalene-2-sulphonic acid, sodium salt is a high-purity, polyazo dye intermediate of significant commercial importance. This compound is valued for its ability to impart deep, vibrant shades and excellent fastness properties in demanding applications. It is primarily sought after by manufacturers in the textile, leather, and specialty ink industries for the production of high-performance dyes and pigments. Its complex structure allows for fine-tuning of color characteristics and material compatibility.

Application

• Textile Dyeing: A key intermediate for synthesizing high-grade, wash-fast and light-fast direct dyes and reactive dyes for cotton, wool, and nylon.
• Leather Coloring: Used in the formulation of dyes for leather finishing, providing rich, durable colors with good penetration.
• Ink Manufacturing: Serves as a critical component in producing specialty inks for packaging, security printing, and digital textiles.
• Paper Coloring: Employed in the production of dyes for high-quality paper and board where color consistency is paramount.
• Research & Development: Utilized in chemical research for developing novel chromophores and studying azo dye chemistry and applications.
• Functional Dyes: Potential intermediate for dyes used in non-textile applications such as lasers, optical data storage, or solar cells.

Basic Information

Product Name	6-[(2,4-diamino-5-sulphophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diamino-5-sulphophenyl)azo]-1-hydroxy-3-sulpho-2-naphthyl]azo]phenyl]amino]-3-sulphophenyl]azo]-4-hydroxynaphthalene-2-sulphonic acid, sodium salt
CAS No.	85188-19-8
Molecular Formula	C44H30N12O14S4•xNa
Molecular Weight	Contact for details
Synonyms	C.I. Direct Brown 1:1; Direct Brown 1:1; Direct Brown 1:1, sodium salt; 85188-19-8; Polyazo dye intermediate; Tetrakisazo dye; Sodium 6-[(2,4-diamino-5-sulfophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diamino-5-sulfophenyl)azo]-1-hydroxy-3-sulfo-2-naphthyl]azo]phenyl]amino]-3-sulfophenyl]azo]-4-hydroxy-2-naphthalenesulfonate
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 performance reliability. Quality is verified through advanced analytical techniques including HPLC for purity and spectrophotometry for color strength assessment. Certificates of Analysis (COA) detailing purity, impurity profile, and physical specifications are provided with every shipment. We support compliance with global regulatory frameworks, including REACH.

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 each use to prevent moisture absorption, which can affect product performance and handling. Keep away from incompatible materials.

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%
Ash Content	Contact for details
Solubility (Water)	Soluble
Heavy Metals (as Pb)	Max. 20 ppm

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