Description

Trisodium 5-Amino-3-[[4'-[(6-Amino-1-Hydroxy-3-Sulphonato-2-Naphthyl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex polyazo structure provides excellent chromophoric properties, making it a critical precursor for synthesizing high-value, colorfast dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vibrant and durable colors.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-grade reactive dyes for cotton, wool, and nylon fibers, offering excellent wash and light fastness.
• Pigment Manufacturing: Used in the production of high-performance organic pigments for inks, plastics, and automotive coatings, providing intense color strength and stability.
• Specialty Ink Formulations: Employed in the manufacture of inks for digital textile printing and security printing applications due to its precise color characteristics.
• Liquid Crystal Dye (LCD) Precursor: Serves as a sophisticated intermediate in the synthesis of dyes for electronic displays, leveraging its specific light-absorption properties.
• Biological Staining Agent: Potential use as an intermediate for histochemical stains and indicators in laboratory and diagnostic applications.
• Research & Development: A valuable compound for chemical R&D in organic synthesis, dye chemistry, and material science studies.

Basic Information

Product Name	Trisodium 5-Amino-3-[[4'-[(6-Amino-1-Hydroxy-3-Sulphonato-2-Naphthyl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonate
CAS No.	6420-22-0
Molecular Formula	C40H26N6Na3O13S3
Molecular Weight	980.81 g/mol
Synonyms	Reactive Black 5 (precursor); C.I. 20505; Trisodium 4-amino-5-hydroxy-3-[[4'-[(2-hydroxy-1-naphthyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-6-(phenylazo)naphthalene-2,7-disulfonate; 5-Amino-4-hydroxy-3-[[4'-[(2-hydroxy-1-naphthyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-6-(phenylazo)naphthalene-2,7-disulfonic acid trisodium salt; Polyazo dye intermediate; Tetrasodium salt variant may exist. Contact for details.
EINECS	229-185-2

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 consistency and meet precise customer specifications. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting key parameters such as assay, impurity profile, and solubility. 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 (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Solubility (in Water)	Clear solution at 1%
pH (1% Solution)	7.0 - 9.0
Heavy Metals (as Pb)	Max. 20 ppm
Related Substances (HPLC)	Total impurities: Max. 5.0%

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