Description

4-Amino-3-[[4'-[(2,4-Diaminophenyl)Azo][1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-[(4-Sulphophenyl)Azo]Naphthalene-2,7-Disulphonic Acid, Sodium Salt is a high-purity, multi-functional azo dye intermediate of significant industrial importance. This compound is valued for its ability to impart deep, complex shades and its role in synthesizing high-performance colorants. It is primarily sought by manufacturers in the textile, ink, and specialty chemical sectors for producing dyes with excellent color fastness and application properties.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-quality reactive dyes for cotton and cellulose fiber dyeing and printing.
• Direct Dye Manufacturing: Used in the production of direct dyes for paper, leather, and textile applications requiring deep, substantive colors.
• Specialty Ink Formulations: Serves as a critical pigment precursor in the manufacture of inks for packaging, security printing, and digital applications.
• Functional Colorant Synthesis: Employed in creating complex, polyazo colorants for niche applications requiring specific lightfastness and chemical resistance.
• Research & Development: Used in academic and industrial R&D labs for developing novel chromophores and studying azo dye chemistry.

Basic Information

Product Name	4-Amino-3-[[4'-[(2,4-Diaminophenyl)Azo][1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-[(4-Sulphophenyl)Azo]Naphthalene-2,7-Disulphonic Acid, Sodium Salt
CAS No.	85480-86-0
Molecular Formula	C40H28N10O10S3 · xNa
Molecular Weight	Contact for details
Synonyms	4-Amino-3-[[4'-[(2,4-diaminophenyl)azo][1,1'-biphenyl]-4-yl]azo]-5-hydroxy-6-[(4-sulfophenyl)azo]naphthalene-2,7-disulfonic acid sodium salt; Polyazo dye intermediate; C.I. Direct Brown 1:1; Tetrakisazo dye intermediate; Sodium 4-amino-3-[[4'-[(2,4-diaminophenyl)azo][1,1'-biphenyl]-4-yl]azo]-5-hydroxy-6-[(4-sulfophenyl)azo]naphthalene-2,7-disulfonate; Azo dye precursor for brown/black shades; CAS 85480-86-0
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistent performance and batch-to-batch reliability for your synthesis processes. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting key specifications such as assay, impurity profile, and solubility.

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). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Solubility (in Water)	Partially soluble to form a colored solution
Heavy Metals (as Pb)	Max. 20 ppm
Related Substances (HPLC)	Individual impurity: Max. 1.0%

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