Description

Trisodium 4-Amino-5-Hydroxy-3-[[4'-[(4-Hydroxyphenyl)Azo]-3,3'-Dimethoxy[1,1'-Biphenyl]-4-Yl]Azo]-6-[(4-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex polyazo structure provides excellent color strength 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 vibrant, durable colors with specific technical characteristics.

Application

• Primary Intermediate for Reactive Dyes: Key building block in the synthesis of high-grade reactive dyes for cotton, wool, and nylon fibers, offering excellent wash and light fastness.
• Direct Dye Manufacturing: Used in the production of direct dyes for paper coloring and textile applications requiring deep, substantive shades.
• Pigment Synthesis: Serves as a precursor for the manufacture of high-performance organic pigments used in inks, plastics, and industrial coatings.
• Specialty Ink Formulations: Employed in creating specialized inks for jet printing, security printing, and other advanced graphic arts applications.
• Research & Development: A valuable compound for R&D laboratories focusing on novel chromophore development and dye chemistry.
• Leather Dyeing: Used in the formulation of dyes for the leather industry to achieve consistent and rich coloration.

Basic Information

Item	Detail
Product Name	Trisodium 4-Amino-5-Hydroxy-3-[[4'-[(4-Hydroxyphenyl)Azo]-3,3'-Dimethoxy[1,1'-Biphenyl]-4-Yl]Azo]-6-[(4-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	70632-07-4
Molecular Formula	C46H30N8Na3O16S3
Molecular Weight	~1100.91 g/mol (as trisodium salt)
Synonyms	Reactive Black 5 Intermediate; Polyazo Dye Intermediate; C.I. Reactive Black 5 precursor; Trisodium 4-Amino-5-hydroxy-6-[2-(4-sulfophenyl)diazenyl]-3-[2-[4-[2-(4-hydroxyphenyl)diazenyl]-3,3'-dimethoxybiphenyl-4-yl]diazenyl]naphthalene-2,7-disulfonate; Azo Dye CAS 70632-07-4; Tetrasodium 8-Amino-9-hydroxy-6-[2-(4-sulfonatophenyl)diazenyl]-7-[2-[4-[2-(4-hydroxyphenyl)diazenyl]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]diazenyl]naphthalene-1,3-disulfonate (related form); Reactive Dye Intermediate 70632-07-4
EINECS	Contact for details

Quality Control

Our Trisodium 4-Amino-5-Hydroxy-3-[[4'-[(4-Hydroxyphenyl)Azo]-3,3'-Dimethoxy[1,1'-Biphenyl]-4-Yl]Azo]-6-[(4-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate is manufactured under a strict quality management system. 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) specifying purity, impurity profile, and physical characteristics is provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). The product is hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark blue to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95% (Area Percent)
Purity (HPLC, Main Component)	Contact for details
Water Content (KF)	≤ 5.0 %
Solubility (in Water)	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 5.0%

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