Description

Trisodium 4-Amino-5-Hydroxy-3-[[4-[[4-[(4-Hydroxyphenyl)Azo]Phenyl]Amino]-3-Sulphonatophenyl]Azo]-6-(Phenylazo)Naphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate known for its complex polyazo structure and multiple sulphonate groups. This compound is engineered to deliver exceptional color strength, thermal stability, and compatibility in demanding industrial formulations. It is primarily sought after by manufacturers in the textile, ink, and specialty coatings industries who require reliable and consistent performance for producing vivid, durable colors.

Application

• Textile Dyeing: As a key intermediate for synthesizing high-grade, wash-fast azo dyes for cotton, wool, and synthetic fibers.
• Inkjet Inks: Used in the formulation of professional and industrial inks, providing excellent color gamut and stability.
• Paper Coloring: Employed in the production of specialty papers, including decorative and security papers.
• Leather Finishing: Imparts deep, uniform coloration to leather goods with good adhesion and lightfastness.
• Research & Development: Serves as a critical reagent in chemical research for developing new chromophores and functional dyes.
• Specialty Coatings: Incorporated into coatings where specific color properties and chemical resistance are required.

Basic Information

Product Name	Trisodium 4-Amino-5-Hydroxy-3-[[4-[[4-[(4-Hydroxyphenyl)Azo]Phenyl]Amino]-3-Sulphonatophenyl]Azo]-6-(Phenylazo)Naphthalene-2,7-Disulphonate
CAS No.	85631-90-9
Molecular Formula	C40H24N8Na3O13S3
Molecular Weight	998.81 g/mol
Synonyms	Acid Black 210; C.I. 300310; Trisodium 4-amino-5-hydroxy-6-(phenylazo)-3-[[4-[[4-[(4-hydroxyphenyl)azo]phenyl]amino]-3-sulfophenyl]azo]naphthalene-2,7-disulfonate; Polyazo Black Dye Intermediate; Azo Dye Precursor 85631-90-9; Reactive Dye Intermediate; Tetrasodium salt variant may exist.
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analysis to ensure it meets precise chemical and physical specifications. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting key parameters such as purity, heavy metal content, and spectroscopic identity. 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 room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

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